640100154 has 32 divisors (see below), whose sum is σ = 1289041920. Its totient is φ = 211899312.

The previous prime is 640100141. The next prime is 640100161. The reversal of 640100154 is 451001046.

640100154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 640100154.

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, 812949 + ... + 813735.

It is an arithmetic number, because the mean of its divisors is an integer number (40282560).

Almost surely, 2^640100154 is an apocalyptic number.

640100154 is an abundant number, since it is smaller than the sum of its proper divisors (648941766).

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

640100154 is a wasteful number, since it uses less digits than its factorization.

640100154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1554.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 640100154 is about 25300.2006711409. The cubic root of 640100154 is about 861.8188268455.

The spelling of 640100154 in words is "six hundred forty million, one hundred thousand, one hundred fifty-four".