261674765360 has 40 divisors (see below), whose sum is σ = 608456688720. Its totient is φ = 104659091712.

The previous prime is 261674765351. The next prime is 261674765381. The reversal of 261674765360 is 63567476162.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×261674765360² (a number of 24 digits) contains 22 as substring.

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, 633851 + ... + 961829.

It is an arithmetic number, because the mean of its divisors is an integer number (15211417218).

Almost surely, 2^261674765360 is an apocalyptic number.

261674765360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261674765360 is an abundant number, since it is smaller than the sum of its proper divisors (346781923360).

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

261674765360 is a wasteful number, since it uses less digits than its factorization.

261674765360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337965 (or 337959 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 53.

The spelling of 261674765360 in words is "two hundred sixty-one billion, six hundred seventy-four million, seven hundred sixty-five thousand, three hundred sixty".