1620515116660 has 48 divisors (see below), whose sum is σ = 3712720536000. Its totient is φ = 589235728640.

The previous prime is 1620515116657. The next prime is 1620515116687. The reversal of 1620515116660 is 666115150261.

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, 2876307 + ... + 3393253.

It is an arithmetic number, because the mean of its divisors is an integer number (77348344500).

Almost surely, 2^{1620515116660} is an apocalyptic number.

1620515116660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1620515116660 is an abundant number, since it is smaller than the sum of its proper divisors (2092205419340).

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

1620515116660 is a wasteful number, since it uses less digits than its factorization.

1620515116660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531216 (or 531214 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 1620515116660 in words is "one trillion, six hundred twenty billion, five hundred fifteen million, one hundred sixteen thousand, six hundred sixty".