640151054 has 16 divisors (see below), whose sum is σ = 993396096. Its totient is φ = 309064800.

The previous prime is 640151053. The next prime is 640151069. The reversal of 640151054 is 450151046.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640151053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17384 + ... + 39780.

It is an arithmetic number, because the mean of its divisors is an integer number (62087256).

Almost surely, 2^640151054 is an apocalyptic number.

640151054 is a deficient number, since it is larger than the sum of its proper divisors (353245042).

640151054 is a wasteful number, since it uses less digits than its factorization.

640151054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22891.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 640151054 is about 25301.2065720194. The cubic root of 640151054 is about 861.8416698414.

The spelling of 640151054 in words is "six hundred forty million, one hundred fifty-one thousand, fifty-four".