640100516 has 24 divisors (see below), whose sum is σ = 1223279904. Its totient is φ = 290652480.

The previous prime is 640100491. The next prime is 640100521. The reversal of 640100516 is 615001046.

It is a junction number, because it is equal to n+sod(n) for n = 640100491 and 640100500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38411 + ... + 52493.

It is an arithmetic number, because the mean of its divisors is an integer number (50969996).

Almost surely, 2^640100516 is an apocalyptic number.

It is an amenable number.

640100516 is a deficient number, since it is larger than the sum of its proper divisors (583179388).

640100516 is a wasteful number, since it uses less digits than its factorization.

640100516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15131 (or 15129 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 640100516 is about 25300.2078252334. The cubic root of 640100516 is about 861.8189893088.

The spelling of 640100516 in words is "six hundred forty million, one hundred thousand, five hundred sixteen".