61920053391 has 32 divisors (see below), whose sum is σ = 96465600000. Its totient is φ = 35314668480.

The previous prime is 61920053369. The next prime is 61920053407. The reversal of 61920053391 is 19335002916.

61920053391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61920053391 - 2¹¹ = 61920051343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61920003391) 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, 478360 + ... + 593858.

It is an arithmetic number, because the mean of its divisors is an integer number (3014550000).

Almost surely, 2^61920053391 is an apocalyptic number.

61920053391 is a deficient number, since it is larger than the sum of its proper divisors (34545546609).

61920053391 is a wasteful number, since it uses less digits than its factorization.

61920053391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116044 (or 116030 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 39.

The spelling of 61920053391 in words is "sixty-one billion, nine hundred twenty million, fifty-three thousand, three hundred ninety-one".