645426415152 has 120 divisors (see below), whose sum is σ = 1810610315904. Its totient is φ = 214629046272.

The previous prime is 645426415129. The next prime is 645426415157. The reversal of 645426415152 is 251514624546.

645426415152 is a `hidden beast` number, since 6 + 4 + 542 + 6 + 4 + 1 + 51 + 52 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 645426415098 and 645426415107.

It is not an unprimeable number, because it can be changed into a prime (645426415157) 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, 194814648 + ... + 194817960.

Almost surely, 2^645426415152 is an apocalyptic number.

It is an amenable number.

645426415152 is an abundant number, since it is smaller than the sum of its proper divisors (1165183900752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645426415152 is a wasteful number, since it uses less digits than its factorization.

645426415152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6147 (or 6138 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 45.

The spelling of 645426415152 in words is "six hundred forty-five billion, four hundred twenty-six million, four hundred fifteen thousand, one hundred fifty-two".