1620948656 has 20 divisors (see below), whose sum is σ = 3141441792. Its totient is φ = 810254016.

The previous prime is 1620948629. The next prime is 1620948731. The reversal of 1620948656 is 6568490261.

It is a self number, because there is not a number n which added to its sum of digits gives 1620948656.

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, 58385 + ... + 81551.

Almost surely, 2^1620948656 is an apocalyptic number.

1620948656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1620948656 is a deficient number, since it is larger than the sum of its proper divisors (1520493136).

1620948656 is a wasteful number, since it uses less digits than its factorization.

1620948656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27548 (or 27542 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 1620948656 is about 40261.0066441464. The cubic root of 1620948656 is about 1174.6894983987.

The spelling of 1620948656 in words is "one billion, six hundred twenty million, nine hundred forty-eight thousand, six hundred fifty-six".