1620839839704 has 64 divisors (see below), whose sum is σ = 4128919142400. Its totient is φ = 530039143296.

The previous prime is 1620839839681. The next prime is 1620839839709. The reversal of 1620839839704 is 4079389380261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620839839709) 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, 16184617 + ... + 16284455.

It is an arithmetic number, because the mean of its divisors is an integer number (64514361600).

Almost surely, 2^{1620839839704} is an apocalyptic number.

It is an amenable number.

1620839839704 is an abundant number, since it is smaller than the sum of its proper divisors (2508079302696).

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

1620839839704 is a wasteful number, since it uses less digits than its factorization.

1620839839704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112664 (or 112660 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 60.

The spelling of 1620839839704 in words is "one trillion, six hundred twenty billion, eight hundred thirty-nine million, eight hundred thirty-nine thousand, seven hundred four".