640054179 has 24 divisors (see below), whose sum is σ = 959422464. Its totient is φ = 410742000.

The previous prime is 640054171. The next prime is 640054187. The reversal of 640054179 is 971450046.

640054179 is a `hidden beast` number, since 6 + 40 + 0 + 541 + 79 = 666.

640054179 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (640054171) and next prime (640054187).

It is not a de Polignac number, because 640054179 - 2³ = 640054171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640054171) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47284 + ... + 59294.

It is an arithmetic number, because the mean of its divisors is an integer number (39975936).

Almost surely, 2^640054179 is an apocalyptic number.

640054179 is a deficient number, since it is larger than the sum of its proper divisors (319368285).

640054179 is a wasteful number, since it uses less digits than its factorization.

640054179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12239 (or 12236 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 640054179 is about 25299.2920651942. The cubic root of 640054179 is about 861.7981930593.

The spelling of 640054179 in words is "six hundred forty million, fifty-four thousand, one hundred seventy-nine".