261502266132 has 96 divisors (see below), whose sum is σ = 716908416000. Its totient is φ = 82298073600.

The previous prime is 261502266121. The next prime is 261502266209. The reversal of 261502266132 is 231662205162.

261502266132 is a `hidden beast` number, since 2 + 6 + 15 + 0 + 2 + 26 + 613 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 815257 + ... + 1089792.

It is an arithmetic number, because the mean of its divisors is an integer number (7467796000).

Almost surely, 2^261502266132 is an apocalyptic number.

It is an amenable number.

261502266132 is an abundant number, since it is smaller than the sum of its proper divisors (455406149868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261502266132 is a wasteful number, since it uses less digits than its factorization.

261502266132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1905134 (or 1905126 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 261502266132 in words is "two hundred sixty-one billion, five hundred two million, two hundred sixty-six thousand, one hundred thirty-two".