640152240701236 has 12 divisors (see below), whose sum is σ = 1147589992476900. Its totient is φ = 312269385707840.

The previous prime is 640152240701227. The next prime is 640152240701273. The reversal of 640152240701236 is 632107042251046.

It can be written as a sum of positive squares in 2 ways, for example, as 351614251904400 + 288537988796836 = 18751380^2 + 16986406^2 .

It is a junction number, because it is equal to n+sod(n) for n = 640152240701192 and 640152240701201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1951683660511 + ... + 1951683660838.

It is an arithmetic number, because the mean of its divisors is an integer number (95632499373075).

Almost surely, 2^{640152240701236} is an apocalyptic number.

It is an amenable number.

640152240701236 is a deficient number, since it is larger than the sum of its proper divisors (507437751775664).

640152240701236 is a wasteful number, since it uses less digits than its factorization.

640152240701236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3903367321394 (or 3903367321392 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 640152240701236 in words is "six hundred forty trillion, one hundred fifty-two billion, two hundred forty million, seven hundred one thousand, two hundred thirty-six".