652801622607981 has 96 divisors (see below), whose sum is σ = 1209753398880000. Its totient is φ = 329304138992640.

The previous prime is 652801622607943. The next prime is 652801622607983. The reversal of 652801622607981 is 189706226108256.

652801622607981 is a `hidden beast` number, since 6 + 5 + 2 + 8 + 0 + 16 + 2 + 2 + 607 + 9 + 8 + 1 = 666.

It is not a de Polignac number, because 652801622607981 - 2²⁶ = 652801555499117 is a prime.

It is a super-2 number, since 2×652801622607981² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (652801622607983) 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, 11957856 + ... + 38060393.

It is an arithmetic number, because the mean of its divisors is an integer number (12601597905000).

Almost surely, 2^{652801622607981} is an apocalyptic number.

It is an amenable number.

652801622607981 is a deficient number, since it is larger than the sum of its proper divisors (556951776272019).

652801622607981 is a wasteful number, since it uses less digits than its factorization.

652801622607981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50018819 (or 50018816 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 63.

The spelling of 652801622607981 in words is "six hundred fifty-two trillion, eight hundred one billion, six hundred twenty-two million, six hundred seven thousand, nine hundred eighty-one".