82261376761 has 4 divisors (see below), whose sum is σ = 84484657252. Its totient is φ = 80038096272.

The previous prime is 82261376741. The next prime is 82261376767. The reversal of 82261376761 is 16767316228.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59954460736 + 22306916025 = 244856^2 + 149355^2 .

It is a cyclic number.

It is not a de Polignac number, because 82261376761 - 2²⁵ = 82227822329 is a prime.

It is a super-2 number, since 2×82261376761² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82261376767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1111640190 + ... + 1111640263.

It is an arithmetic number, because the mean of its divisors is an integer number (21121164313).

Almost surely, 2^82261376761 is an apocalyptic number.

It is an amenable number.

82261376761 is a deficient number, since it is larger than the sum of its proper divisors (2223280491).

82261376761 is a wasteful number, since it uses less digits than its factorization.

82261376761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223280490.

The product of its digits is 1016064, while the sum is 49.

The spelling of 82261376761 in words is "eighty-two billion, two hundred sixty-one million, three hundred seventy-six thousand, seven hundred sixty-one".