1641564163572 has 12 divisors (see below), whose sum is σ = 3830316381696. Its totient is φ = 547188054520.

The previous prime is 1641564163567. The next prime is 1641564163609. The reversal of 1641564163572 is 2753614651461.

It is a tau number, because it is divible by the number of its divisors (12).

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, 68398506804 + ... + 68398506827.

It is an arithmetic number, because the mean of its divisors is an integer number (319193031808).

Almost surely, 2^{1641564163572} is an apocalyptic number.

1641564163572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1641564163572 is an abundant number, since it is smaller than the sum of its proper divisors (2188752218124).

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

1641564163572 is a wasteful number, since it uses less digits than its factorization.

1641564163572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136797013638 (or 136797013636 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 51.

The spelling of 1641564163572 in words is "one trillion, six hundred forty-one billion, five hundred sixty-four million, one hundred sixty-three thousand, five hundred seventy-two".