82747701261 has 12 divisors (see below), whose sum is σ = 123645990780. Its totient is φ = 53262888000.

The previous prime is 82747701247. The next prime is 82747701347. The reversal of 82747701261 is 16210774728.

It can be written as a sum of positive squares in 2 ways, for example, as 51810409161 + 30937292100 = 227619^2 + 175890^2 .

It is not a de Polignac number, because 82747701261 - 2²⁵ = 82714146829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82747701221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158520240 + ... + 158520761.

It is an arithmetic number, because the mean of its divisors is an integer number (10303832565).

Almost surely, 2^82747701261 is an apocalyptic number.

It is an amenable number.

82747701261 is a deficient number, since it is larger than the sum of its proper divisors (40898289519).

82747701261 is a wasteful number, since it uses less digits than its factorization.

82747701261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317041036 (or 317041033 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 45.

The spelling of 82747701261 in words is "eighty-two billion, seven hundred forty-seven million, seven hundred one thousand, two hundred sixty-one".