261507757117612 has 12 divisors (see below), whose sum is σ = 457638796908216. Its totient is φ = 130753815143840.

The previous prime is 261507757117609. The next prime is 261507757117669. The reversal of 261507757117612 is 216711757705162.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5877814 + ... + 23612797.

It is an arithmetic number, because the mean of its divisors is an integer number (38136566409018).

Almost surely, 2^{261507757117612} is an apocalyptic number.

It is an amenable number.

261507757117612 is a deficient number, since it is larger than the sum of its proper divisors (196131039790604).

261507757117612 is a wasteful number, since it uses less digits than its factorization.

261507757117612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31707488 (or 31707486 counting only the distinct ones).

The product of its (nonzero) digits is 8643600, while the sum is 58.

The spelling of 261507757117612 in words is "two hundred sixty-one trillion, five hundred seven billion, seven hundred fifty-seven million, one hundred seventeen thousand, six hundred twelve".