1622156656 has 20 divisors (see below), whose sum is σ = 3162952072. Its totient is φ = 805910976.

The previous prime is 1622156647. The next prime is 1622156693. The reversal of 1622156656 is 6566512261.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320370 + ... + 325393.

Almost surely, 2^1622156656 is an apocalyptic number.

1622156656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1622156656 is a deficient number, since it is larger than the sum of its proper divisors (1540795416).

1622156656 is a wasteful number, since it uses less digits than its factorization.

1622156656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645928 (or 645922 counting only the distinct ones).

The product of its digits is 129600, while the sum is 40.

The square root of 1622156656 is about 40276.0059588833. The cubic root of 1622156656 is about 1174.9812354933.

The spelling of 1622156656 in words is "one billion, six hundred twenty-two million, one hundred fifty-six thousand, six hundred fifty-six".