645847157373 has 24 divisors (see below), whose sum is σ = 946811755008. Its totient is φ = 391306344000.

The previous prime is 645847157311. The next prime is 645847157377. The reversal of 645847157373 is 373751748546.

It is a de Polignac number, because none of the positive numbers 2^k-645847157373 is a prime.

It is a super-2 number, since 2×645847157373² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645847157377) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 968593 + ... + 1493273.

It is an arithmetic number, because the mean of its divisors is an integer number (39450489792).

Almost surely, 2^645847157373 is an apocalyptic number.

It is an amenable number.

645847157373 is a deficient number, since it is larger than the sum of its proper divisors (300964597635).

645847157373 is a wasteful number, since it uses less digits than its factorization.

645847157373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528097 (or 528086 counting only the distinct ones).

The product of its digits is 59270400, while the sum is 60.

The spelling of 645847157373 in words is "six hundred forty-five billion, eight hundred forty-seven million, one hundred fifty-seven thousand, three hundred seventy-three".