261922382496 has 72 divisors (see below), whose sum is σ = 750278689524. Its totient is φ = 86670167040.

The previous prime is 261922382453. The next prime is 261922382537. The reversal of 261922382496 is 694283229162.

261922382496 is a `hidden beast` number, since 2 + 61 + 92 + 2 + 3 + 8 + 2 + 496 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 257718675600 + 4203706896 = 507660^2 + 64836^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3279715 + ... + 3358626.

Almost surely, 2^261922382496 is an apocalyptic number.

It is an amenable number.

261922382496 is an abundant number, since it is smaller than the sum of its proper divisors (488356307028).

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

261922382496 is a wasteful number, since it uses less digits than its factorization.

261922382496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6638494 (or 6638483 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The spelling of 261922382496 in words is "two hundred sixty-one billion, nine hundred twenty-two million, three hundred eighty-two thousand, four hundred ninety-six".