1640992572 has 36 divisors (see below), whose sum is σ = 4226334840. Its totient is φ = 536676192.

The previous prime is 1640992543. The next prime is 1640992583. The reversal of 1640992572 is 2752990461.

It is a tau number, because it is divible by the number of its divisors (36).

It is a zygodrome in base 2.

It is a congruent number.

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, 428122 + ... + 431937.

It is an arithmetic number, because the mean of its divisors is an integer number (117398190).

Almost surely, 2^1640992572 is an apocalyptic number.

1640992572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1640992572 is an abundant number, since it is smaller than the sum of its proper divisors (2585342268).

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

1640992572 is a wasteful number, since it uses less digits than its factorization.

1640992572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860122 (or 860117 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 1640992572 is about 40509.1665182092. The cubic root of 1640992572 is about 1179.5115693762.

The spelling of 1640992572 in words is "one billion, six hundred forty million, nine hundred ninety-two thousand, five hundred seventy-two".