640072626000 has 160 divisors (see below), whose sum is σ = 2102530929408. Its totient is φ = 167465459200.

The previous prime is 640072625989. The next prime is 640072626049. The reversal of 640072626000 is 626270046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 688404 + ... + 1324403.

Almost surely, 2^640072626000 is an apocalyptic number.

640072626000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

640072626000 is an abundant number, since it is smaller than the sum of its proper divisors (1462458303408).

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

640072626000 is a wasteful number, since it uses less digits than its factorization.

640072626000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012886 (or 2012870 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

Adding to 640072626000 its reverse (626270046), we get a palindrome (640698896046).

The spelling of 640072626000 in words is "six hundred forty billion, seventy-two million, six hundred twenty-six thousand".