1620544605288 has 64 divisors (see below), whose sum is σ = 4630302904320. Its totient is φ = 462995198400.

The previous prime is 1620544605203. The next prime is 1620544605319. The reversal of 1620544605288 is 8825064450261.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1620544605288.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4641553 + ... + 4978463.

It is an arithmetic number, because the mean of its divisors is an integer number (72348482880).

Almost surely, 2^{1620544605288} is an apocalyptic number.

It is an amenable number.

1620544605288 is an abundant number, since it is smaller than the sum of its proper divisors (3009758299032).

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

1620544605288 is a wasteful number, since it uses less digits than its factorization.

1620544605288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365558 (or 365554 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 51.

The spelling of 1620544605288 in words is "one trillion, six hundred twenty billion, five hundred forty-four million, six hundred five thousand, two hundred eighty-eight".