1620605056240 has 80 divisors (see below), whose sum is σ = 4058455420800. Its totient is φ = 599842043136.

The previous prime is 1620605056211. The next prime is 1620605056331. The reversal of 1620605056240 is 426505060261.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 1620605056240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12332170 + ... + 12462889.

It is an arithmetic number, because the mean of its divisors is an integer number (50730692760).

Almost surely, 2^{1620605056240} is an apocalyptic number.

1620605056240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1620605056240 is an abundant number, since it is smaller than the sum of its proper divisors (2437850364560).

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

1620605056240 is a wasteful number, since it uses less digits than its factorization.

1620605056240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24795134 (or 24795128 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 1620605056240 in words is "one trillion, six hundred twenty billion, six hundred five million, fifty-six thousand, two hundred forty".