5655994978 has 8 divisors (see below), whose sum is σ = 8486985168. Its totient is φ = 2826999924.

The previous prime is 5655994957. The next prime is 5655994987. The reversal of 5655994978 is 8794995565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×5655994978² = 63980558382322440968, which contains 22 as substring.

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, 491676 + ... + 503047.

It is an arithmetic number, because the mean of its divisors is an integer number (1060873146).

Almost surely, 2^5655994978 is an apocalyptic number.

5655994978 is a deficient number, since it is larger than the sum of its proper divisors (2830990190).

5655994978 is a wasteful number, since it uses less digits than its factorization.

5655994978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997568.

The product of its digits is 122472000, while the sum is 67.

The square root of 5655994978 is about 75206.3493197217. The cubic root of 5655994978 is about 1781.7072138589.

The spelling of 5655994978 in words is "five billion, six hundred fifty-five million, nine hundred ninety-four thousand, nine hundred seventy-eight".