61640140611432 has 128 divisors (see below), whose sum is σ = 155067859785600. Its totient is φ = 20418185023488.

The previous prime is 61640140611431. The next prime is 61640140611473. The reversal of 61640140611432 is 23411604104616.

It is not an unprimeable number, because it can be changed into a prime (61640140611431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5361405108 + ... + 5361416604.

It is an arithmetic number, because the mean of its divisors is an integer number (1211467654575).

Almost surely, 2^{61640140611432} is an apocalyptic number.

It is an amenable number.

61640140611432 is an abundant number, since it is smaller than the sum of its proper divisors (93427719174168).

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

61640140611432 is a wasteful number, since it uses less digits than its factorization.

61640140611432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13955 (or 13951 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 61640140611432 in words is "sixty-one trillion, six hundred forty billion, one hundred forty million, six hundred eleven thousand, four hundred thirty-two".