261440637356702 has 16 divisors (see below), whose sum is σ = 395839778833152. Its totient is φ = 129494129394840.

The previous prime is 261440637356693. The next prime is 261440637356741. The reversal of 261440637356702 is 207653736044162.

It is a super-2 number, since 2×261440637356702² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15074198 + ... + 27388185.

It is an arithmetic number, because the mean of its divisors is an integer number (24739986177072).

Almost surely, 2^{261440637356702} is an apocalyptic number.

261440637356702 is a deficient number, since it is larger than the sum of its proper divisors (134399141476450).

261440637356702 is a wasteful number, since it uses less digits than its factorization.

261440637356702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42491263.

The product of its (nonzero) digits is 30481920, while the sum is 56.

The spelling of 261440637356702 in words is "two hundred sixty-one trillion, four hundred forty billion, six hundred thirty-seven million, three hundred fifty-six thousand, seven hundred two".