261612615524 has 24 divisors (see below), whose sum is σ = 493126962048. Its totient is φ = 120722781600.

The previous prime is 261612615521. The next prime is 261612615533. The reversal of 261612615524 is 425516216162.

It is not an unprimeable number, because it can be changed into a prime (261612615521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151292 + ... + 738995.

It is an arithmetic number, because the mean of its divisors is an integer number (20546956752).

Almost surely, 2^261612615524 is an apocalyptic number.

It is an amenable number.

261612615524 is a deficient number, since it is larger than the sum of its proper divisors (231514346524).

261612615524 is a wasteful number, since it uses less digits than its factorization.

261612615524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895955 (or 895953 counting only the distinct ones).

The product of its digits is 172800, while the sum is 41.

The spelling of 261612615524 in words is "two hundred sixty-one billion, six hundred twelve million, six hundred fifteen thousand, five hundred twenty-four".