877614849721 has 3 divisors (see below), whose sum is σ = 877615786533. Its totient is φ = 877613912910.

The previous prime is 877614849673. The next prime is 877614849737. The reversal of 877614849721 is 127948416778.

The square root of 877614849721 is 936811.

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 877614849721 - 2¹⁷ = 877614718649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (877614849751) 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, 468406 + ... + 1405216.

It is an arithmetic number, because the mean of its divisors is an integer number (292538595511).

Almost surely, 2^877614849721 is an apocalyptic number.

877614849721 is the 936811-st square number.

877614849721 is the 468406-th centered octagonal number.

It is an amenable number.

877614849721 is a deficient number, since it is larger than the sum of its proper divisors (936812).

877614849721 is an frugal number, since it uses more digits than its factorization.

877614849721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873622 (or 936811 counting only the distinct ones).

The product of its digits is 37933056, while the sum is 64.

Multiplying 877614849721 by its sum of digits (64), we get a square (56167350382144 = 7494488²).

The spelling of 877614849721 in words is "eight hundred seventy-seven billion, six hundred fourteen million, eight hundred forty-nine thousand, seven hundred twenty-one".