1645037574152 has 64 divisors (see below), whose sum is σ = 3592570475520. Its totient is φ = 691646061888.

The previous prime is 1645037574133. The next prime is 1645037574157. The reversal of 1645037574152 is 2514757305461.

It is a super-2 number, since 2×1645037574152² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1645037574152.

It is not an unprimeable number, because it can be changed into a prime (1645037574157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 715538 + ... + 1949889.

It is an arithmetic number, because the mean of its divisors is an integer number (56133913680).

Almost surely, 2^{1645037574152} is an apocalyptic number.

It is an amenable number.

1645037574152 is an abundant number, since it is smaller than the sum of its proper divisors (1947532901368).

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

1645037574152 is a wasteful number, since it uses less digits than its factorization.

1645037574152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665650 (or 2665646 counting only the distinct ones).

The product of its (nonzero) digits is 3528000, while the sum is 50.

The spelling of 1645037574152 in words is "one trillion, six hundred forty-five billion, thirty-seven million, five hundred seventy-four thousand, one hundred fifty-two".