640452253016 has 16 divisors (see below), whose sum is σ = 1212737559840. Its totient is φ = 317055570400.

The previous prime is 640452253003. The next prime is 640452253097. The reversal of 640452253016 is 610352254046.

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, 396318656 + ... + 396320271.

It is an arithmetic number, because the mean of its divisors is an integer number (75796097490).

Almost surely, 2^640452253016 is an apocalyptic number.

It is an amenable number.

640452253016 is a deficient number, since it is larger than the sum of its proper divisors (572285306824).

640452253016 is a wasteful number, since it uses less digits than its factorization.

640452253016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792639034 (or 792639030 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 640452253016 in words is "six hundred forty billion, four hundred fifty-two million, two hundred fifty-three thousand, sixteen".