261433526156 has 24 divisors (see below), whose sum is σ = 500438470224. Its totient is φ = 118514825280.

The previous prime is 261433526119. The next prime is 261433526201. The reversal of 261433526156 is 651625334162.

It is a super-2 number, since 2×261433526156² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 7948295 + ... + 7981118.

It is an arithmetic number, because the mean of its divisors is an integer number (20851602926).

Almost surely, 2^261433526156 is an apocalyptic number.

It is an amenable number.

261433526156 is a deficient number, since it is larger than the sum of its proper divisors (239004944068).

261433526156 is a wasteful number, since it uses less digits than its factorization.

261433526156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15929801 (or 15929799 counting only the distinct ones).

The product of its digits is 777600, while the sum is 44.

The spelling of 261433526156 in words is "two hundred sixty-one billion, four hundred thirty-three million, five hundred twenty-six thousand, one hundred fifty-six".