1912281656 has 32 divisors (see below), whose sum is σ = 3772273680. Its totient is φ = 907603200.

The previous prime is 1912281649. The next prime is 1912281661. The reversal of 1912281656 is 6561822191.

It is a super-2 number, since 2×1912281656² = 7313642263748204672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66650 + ... + 90921.

Almost surely, 2^1912281656 is an apocalyptic number.

It is an amenable number.

1912281656 is a deficient number, since it is larger than the sum of its proper divisors (1859992024).

1912281656 is a wasteful number, since it uses less digits than its factorization.

1912281656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157655 (or 157651 counting only the distinct ones).

The product of its digits is 51840, while the sum is 41.

The square root of 1912281656 is about 43729.6427609465. The cubic root of 1912281656 is about 1241.2253011382.

The spelling of 1912281656 in words is "one billion, nine hundred twelve million, two hundred eighty-one thousand, six hundred fifty-six".