61501663233 has 20 divisors (see below), whose sum is σ = 92481302848. Its totient is φ = 40729570200.

The previous prime is 61501663219. The next prime is 61501663253. The reversal of 61501663233 is 33236610516.

61501663233 is a `hidden beast` number, since 6 + 1 + 5 + 0 + 16 + 632 + 3 + 3 = 666.

It is not a de Polignac number, because 61501663233 - 2²⁶ = 61434554369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61501663253) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2501941 + ... + 2526402.

Almost surely, 2^61501663233 is an apocalyptic number.

It is an amenable number.

61501663233 is a deficient number, since it is larger than the sum of its proper divisors (30979639615).

61501663233 is a wasteful number, since it uses less digits than its factorization.

61501663233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5028506 (or 5028497 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The spelling of 61501663233 in words is "sixty-one billion, five hundred one million, six hundred sixty-three thousand, two hundred thirty-three".