65648833875081 has 96 divisors (see below), whose sum is σ = 104082735144960. Its totient is φ = 39719160000000.

The previous prime is 65648833875077. The next prime is 65648833875103. The reversal of 65648833875081 is 18057833884656.

65648833875081 is a `hidden beast` number, since 6 + 5 + 6 + 4 + 8 + 8 + 33 + 87 + 508 + 1 = 666.

It is not a de Polignac number, because 65648833875081 - 2² = 65648833875077 is a prime.

It is a super-2 number, since 2×65648833875081² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65648833875041) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 278348956 + ... + 278584706.

It is an arithmetic number, because the mean of its divisors is an integer number (1084195157760).

Almost surely, 2^{65648833875081} is an apocalyptic number.

It is an amenable number.

65648833875081 is a deficient number, since it is larger than the sum of its proper divisors (38433901269879).

65648833875081 is a wasteful number, since it uses less digits than its factorization.

65648833875081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236339 (or 236336 counting only the distinct ones).

The product of its (nonzero) digits is 928972800, while the sum is 72.

The spelling of 65648833875081 in words is "sixty-five trillion, six hundred forty-eight billion, eight hundred thirty-three million, eight hundred seventy-five thousand, eighty-one".