640413447572 has 48 divisors (see below), whose sum is σ = 1158240182400. Its totient is φ = 309600289152.

The previous prime is 640413447559. The next prime is 640413447581. The reversal of 640413447572 is 275744314046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24343658 + ... + 24369950.

It is an arithmetic number, because the mean of its divisors is an integer number (24130003800).

Almost surely, 2^640413447572 is an apocalyptic number.

It is an amenable number.

640413447572 is a deficient number, since it is larger than the sum of its proper divisors (517826734828).

640413447572 is a wasteful number, since it uses less digits than its factorization.

640413447572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27360 (or 27358 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 47.

The spelling of 640413447572 in words is "six hundred forty billion, four hundred thirteen million, four hundred forty-seven thousand, five hundred seventy-two".