652256768421 has 6 divisors (see below), whose sum is σ = 942148665510. Its totient is φ = 434837845608.

The previous prime is 652256768393. The next prime is 652256768437. The reversal of 652256768421 is 124867652256.

652256768421 is a `hidden beast` number, since 6 + 52 + 2 + 567 + 6 + 8 + 4 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 607698202500 + 44558565921 = 779550^2 + 211089^2 .

It is a de Polignac number, because none of the positive numbers 2^k-652256768421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (652256768441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36236487126 + ... + 36236487143.

It is an arithmetic number, because the mean of its divisors is an integer number (157024777585).

Almost surely, 2^652256768421 is an apocalyptic number.

It is an amenable number.

652256768421 is a deficient number, since it is larger than the sum of its proper divisors (289891897089).

652256768421 is a wasteful number, since it uses less digits than its factorization.

652256768421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72472974275 (or 72472974272 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 54.

The spelling of 652256768421 in words is "six hundred fifty-two billion, two hundred fifty-six million, seven hundred sixty-eight thousand, four hundred twenty-one".