1640640625932 has 384 divisors, whose sum is σ = 5062628229120. Its totient is φ = 400619520000.

The previous prime is 1640640625903. The next prime is 1640640626033. The reversal of 1640640625932 is 2395260460461.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1696628913 + ... + 1696629879.

It is an arithmetic number, because the mean of its divisors is an integer number (13183927680).

Almost surely, 2^{1640640625932} is an apocalyptic number.

1640640625932 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1640640625932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2531314114560).

1640640625932 is an abundant number, since it is smaller than the sum of its proper divisors (3421987603188).

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

1640640625932 is a wasteful number, since it uses less digits than its factorization.

1640640625932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653 (or 1651 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 48.

The spelling of 1640640625932 in words is "one trillion, six hundred forty billion, six hundred forty million, six hundred twenty-five thousand, nine hundred thirty-two".