645084054 has 32 divisors (see below), whose sum is σ = 1444823040. Its totient is φ = 213332616.

The previous prime is 645084043. The next prime is 645084079. The reversal of 645084054 is 450480546.

645084054 is a `hidden beast` number, since 64 + 508 + 40 + 54 = 666.

It is a super-2 number, since 2×645084054² = 832266873450149832, which contains 22 as substring.

It is a congruent number.

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, 40174 + ... + 53889.

It is an arithmetic number, because the mean of its divisors is an integer number (45150720).

Almost surely, 2^645084054 is an apocalyptic number.

645084054 is an abundant number, since it is smaller than the sum of its proper divisors (799738986).

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

645084054 is a wasteful number, since it uses less digits than its factorization.

645084054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94201 (or 94195 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The square root of 645084054 is about 25398.5049560009. The cubic root of 645084054 is about 864.0497897619.

The spelling of 645084054 in words is "six hundred forty-five million, eighty-four thousand, fifty-four".