61631631565040 has 40 divisors (see below), whose sum is σ = 144421839029760. Its totient is φ = 24458537246976.

The previous prime is 61631631564991. The next prime is 61631631565067. The reversal of 61631631565040 is 4056513613616.

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

It is a congruent number.

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, 3033042575 + ... + 3033062894.

It is an arithmetic number, because the mean of its divisors is an integer number (3610545975744).

Almost surely, 2^{61631631565040} is an apocalyptic number.

It is an amenable number.

61631631565040 is an abundant number, since it is smaller than the sum of its proper divisors (82790207464720).

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

61631631565040 is a wasteful number, since it uses less digits than its factorization.

61631631565040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6066105609 (or 6066105603 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 47.

The spelling of 61631631565040 in words is "sixty-one trillion, six hundred thirty-one billion, six hundred thirty-one million, five hundred sixty-five thousand, forty".