640186059042 has 24 divisors (see below), whose sum is σ = 1387211240844. Its totient is φ = 213373592064.

The previous prime is 640186059031. The next prime is 640186059061. The reversal of 640186059042 is 240950681046.

640186059042 is a `hidden beast` number, since 6 + 4 + 0 + 18 + 6 + 0 + 590 + 42 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 583422520041 + 56763539001 = 763821^2 + 238251^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1631503 + ... + 1985490.

Almost surely, 2^640186059042 is an apocalyptic number.

640186059042 is an abundant number, since it is smaller than the sum of its proper divisors (747025181802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

640186059042 is a wasteful number, since it uses less digits than its factorization.

640186059042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3626834 (or 3626831 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 640186059042 in words is "six hundred forty billion, one hundred eighty-six million, fifty-nine thousand, forty-two".