402561647027540 has 96 divisors (see below), whose sum is σ = 1135054937689344. Its totient is φ = 115821932405760.

The previous prime is 402561647027381. The next prime is 402561647027557. The reversal of 402561647027540 is 45720746165204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10053967169 + ... + 10054007208.

It is an arithmetic number, because the mean of its divisors is an integer number (11823488934264).

Almost surely, 2^{402561647027540} is an apocalyptic number.

It is an amenable number.

402561647027540 is an abundant number, since it is smaller than the sum of its proper divisors (732493290661804).

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

402561647027540 is a wasteful number, since it uses less digits than its factorization.

402561647027540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20107974417 (or 20107974415 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 53.

The spelling of 402561647027540 in words is "four hundred two trillion, five hundred sixty-one billion, six hundred forty-seven million, twenty-seven thousand, five hundred forty".