261552373055156 has 48 divisors (see below), whose sum is σ = 482720835428160. Its totient is φ = 123658314024960.

The previous prime is 261552373055147. The next prime is 261552373055161. The reversal of 261552373055156 is 651550373255162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269775986 + ... + 270743766.

It is an arithmetic number, because the mean of its divisors is an integer number (10056684071420).

Almost surely, 2^{261552373055156} is an apocalyptic number.

It is an amenable number.

261552373055156 is a deficient number, since it is larger than the sum of its proper divisors (221168462373004).

261552373055156 is a wasteful number, since it uses less digits than its factorization.

261552373055156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974544 (or 974542 counting only the distinct ones).

The product of its (nonzero) digits is 28350000, while the sum is 56.

The spelling of 261552373055156 in words is "two hundred sixty-one trillion, five hundred fifty-two billion, three hundred seventy-three million, fifty-five thousand, one hundred fifty-six".