645356154 has 32 divisors (see below), whose sum is σ = 1350349056. Its totient is φ = 205402880.

The previous prime is 645356141. The next prime is 645356207. The reversal of 645356154 is 451653546.

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, 16347 + ... + 39470.

It is an arithmetic number, because the mean of its divisors is an integer number (42198408).

Almost surely, 2^645356154 is an apocalyptic number.

645356154 is an abundant number, since it is smaller than the sum of its proper divisors (704992902).

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

645356154 is a wasteful number, since it uses less digits than its factorization.

645356154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55910.

The product of its digits is 216000, while the sum is 39.

The square root of 645356154 is about 25403.8610057605. The cubic root of 645356154 is about 864.1712596683.

The spelling of 645356154 in words is "six hundred forty-five million, three hundred fifty-six thousand, one hundred fifty-four".