1620165124 has 12 divisors (see below), whose sum is σ = 2881769548. Its totient is φ = 796802400.

The previous prime is 1620165119. The next prime is 1620165179. The reversal of 1620165124 is 4215610261.

It can be written as a sum of positive squares in 2 ways, for example, as 648720900 + 971444224 = 25470^2 + 31168^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1620165092 and 1620165101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3319767 + ... + 3320254.

Almost surely, 2^1620165124 is an apocalyptic number.

It is an amenable number.

1620165124 is a deficient number, since it is larger than the sum of its proper divisors (1261604424).

1620165124 is a wasteful number, since it uses less digits than its factorization.

1620165124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6640086 (or 6640084 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1620165124 is about 40251.2748121100. The cubic root of 1620165124 is about 1174.5001946125.

Adding to 1620165124 its reverse (4215610261), we get a palindrome (5835775385).

The spelling of 1620165124 in words is "one billion, six hundred twenty million, one hundred sixty-five thousand, one hundred twenty-four".