645415566355 has 16 divisors (see below), whose sum is σ = 899651865024. Its totient is φ = 435315415680.

The previous prime is 645415566331. The next prime is 645415566407. The reversal of 645415566355 is 553665514546.

645415566355 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 645415566355 - 2¹⁷ = 645415435283 is a prime.

It is a super-2 number, since 2×645415566355² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 645415566296 and 645415566305.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151149052 + ... + 151153321.

It is an arithmetic number, because the mean of its divisors is an integer number (56228241564).

Almost surely, 2^645415566355 is an apocalyptic number.

645415566355 is a deficient number, since it is larger than the sum of its proper divisors (254236298669).

645415566355 is a wasteful number, since it uses less digits than its factorization.

645415566355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302302446.

The product of its digits is 32400000, while the sum is 55.

The spelling of 645415566355 in words is "six hundred forty-five billion, four hundred fifteen million, five hundred sixty-six thousand, three hundred fifty-five".