9877311266761 has 3 divisors (see below), whose sum is σ = 9877314409581. Its totient is φ = 9877308123942.

The previous prime is 9877311266729. The next prime is 9877311266819. The reversal of 9877311266761 is 1676621137789.

The square root of 9877311266761 is 3142819.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 9877311266761 - 2⁵ = 9877311266729 is a prime.

It is a super-2 number, since 2×9877311266761² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9877311266693 and 9877311266702.

It is not an unprimeable number, because it can be changed into a prime (9877311266161) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1571410 + ... + 4714228.

It is an arithmetic number, because the mean of its divisors is an integer number (3292438136527).

Almost surely, 2^{9877311266761} is an apocalyptic number.

9877311266761 is the 3142819-th square number.

9877311266761 is the 1571410-th centered octagonal number.

It is an amenable number.

9877311266761 is a deficient number, since it is larger than the sum of its proper divisors (3142820).

9877311266761 is an frugal number, since it uses more digits than its factorization.

9877311266761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6285638 (or 3142819 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 64.

Multiplying 9877311266761 by its sum of digits (64), we get a square (632147921072704 = 25142552²).

The spelling of 9877311266761 in words is "nine trillion, eight hundred seventy-seven billion, three hundred eleven million, two hundred sixty-six thousand, seven hundred sixty-one".