640680308151 has 32 divisors (see below), whose sum is σ = 952488337920. Its totient is φ = 380343600000.

The previous prime is 640680308143. The next prime is 640680308173. The reversal of 640680308151 is 151803086046.

It is not a de Polignac number, because 640680308151 - 2³ = 640680308143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640680308101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1082526 + ... + 1566276.

It is an arithmetic number, because the mean of its divisors is an integer number (29765260560).

Almost surely, 2^640680308151 is an apocalyptic number.

640680308151 is a deficient number, since it is larger than the sum of its proper divisors (311808029769).

640680308151 is a wasteful number, since it uses less digits than its factorization.

640680308151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484967.

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 640680308151 in words is "six hundred forty billion, six hundred eighty million, three hundred eight thousand, one hundred fifty-one".