261425621160 has 96 divisors (see below), whose sum is σ = 926872670880. Its totient is φ = 63375907200.

The previous prime is 261425621153. The next prime is 261425621203. The reversal of 261425621160 is 61126524162.

261425621160 is a `hidden beast` number, since 2 + 6 + 1 + 4 + 25 + 621 + 1 + 6 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33004326 + ... + 33012245.

It is an arithmetic number, because the mean of its divisors is an integer number (9654923655).

Almost surely, 2^261425621160 is an apocalyptic number.

261425621160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261425621160 is an abundant number, since it is smaller than the sum of its proper divisors (665447049720).

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

261425621160 is a wasteful number, since it uses less digits than its factorization.

261425621160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66016599 (or 66016592 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 261425621160 in words is "two hundred sixty-one billion, four hundred twenty-five million, six hundred twenty-one thousand, one hundred sixty".