61920730593 has 12 divisors (see below), whose sum is σ = 89904482980. Its totient is φ = 41066597376.

The previous prime is 61920730567. The next prime is 61920730607. The reversal of 61920730593 is 39503702916.

61920730593 is a `hidden beast` number, since 6 + 1 + 9 + 20 + 7 + 30 + 593 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21436473744 + 40484256849 = 146412^2 + 201207^2 .

It is not a de Polignac number, because 61920730593 - 2²⁰ = 61919682017 is a prime.

It is a super-2 number, since 2×61920730593² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61920730093) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17822308 + ... + 17825781.

Almost surely, 2^61920730593 is an apocalyptic number.

It is an amenable number.

61920730593 is a deficient number, since it is larger than the sum of its proper divisors (27983752387).

61920730593 is a wasteful number, since it uses less digits than its factorization.

61920730593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35648288 (or 35648285 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The spelling of 61920730593 in words is "sixty-one billion, nine hundred twenty million, seven hundred thirty thousand, five hundred ninety-three".