261486153082277 has 16 divisors (see below), whose sum is σ = 262164024532800. Its totient is φ = 260809200691200.

The previous prime is 261486153082207. The next prime is 261486153082303. The reversal of 261486153082277 is 772280351684162.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261486153082277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261486153082207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4905996974 + ... + 4906050272.

It is an arithmetic number, because the mean of its divisors is an integer number (16385251533300).

Almost surely, 2^{261486153082277} is an apocalyptic number.

It is an amenable number.

261486153082277 is a deficient number, since it is larger than the sum of its proper divisors (677871450523).

261486153082277 is a wasteful number, since it uses less digits than its factorization.

261486153082277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61684.

The product of its (nonzero) digits is 54190080, while the sum is 62.

The spelling of 261486153082277 in words is "two hundred sixty-one trillion, four hundred eighty-six billion, one hundred fifty-three million, eighty-two thousand, two hundred seventy-seven".