1620164605050 has 72 divisors (see below), whose sum is σ = 4542096278304. Its totient is φ = 413259374880.

The previous prime is 1620164604977. The next prime is 1620164605093. The reversal of 1620164605050 is 505064610261.

1620164605050 is a `hidden beast` number, since 1 + 6 + 2 + 0 + 1 + 646 + 0 + 5 + 0 + 5 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1620164604996 and 1620164605014.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 78258472 + ... + 78279171.

It is an arithmetic number, because the mean of its divisors is an integer number (63084670532).

Almost surely, 2^{1620164605050} is an apocalyptic number.

1620164605050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1620164605050 is an abundant number, since it is smaller than the sum of its proper divisors (2921931673254).

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

1620164605050 is a wasteful number, since it uses less digits than its factorization.

1620164605050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156537684 (or 156537676 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 1620164605050 in words is "one trillion, six hundred twenty billion, one hundred sixty-four million, six hundred five thousand, fifty".