61640747027344 has 20 divisors (see below), whose sum is σ = 119552451994624. Its totient is φ = 30788501351328.

The previous prime is 61640747027297. The next prime is 61640747027399. The reversal of 61640747027344 is 44372074704616.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1991994192 + ... + 1992025135.

Almost surely, 2^{61640747027344} is an apocalyptic number.

It is an amenable number.

61640747027344 is a deficient number, since it is larger than the sum of its proper divisors (57911704967280).

61640747027344 is a wasteful number, since it uses less digits than its factorization.

61640747027344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3984020302 (or 3984020296 counting only the distinct ones).

The product of its (nonzero) digits is 18966528, while the sum is 55.

The spelling of 61640747027344 in words is "sixty-one trillion, six hundred forty billion, seven hundred forty-seven million, twenty-seven thousand, three hundred forty-four".