2056978668 has 12 divisors (see below), whose sum is σ = 4799616920. Its totient is φ = 685659552.

The previous prime is 2056978667. The next prime is 2056978669. The reversal of 2056978668 is 8668796502.

It is an interprime number because it is at equal distance from previous prime (2056978667) and next prime (2056978669).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×2056978668² = 8462322481214108448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2056978661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85707433 + ... + 85707456.

Almost surely, 2^2056978668 is an apocalyptic number.

It is an amenable number.

2056978668 is an abundant number, since it is smaller than the sum of its proper divisors (2742638252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2056978668 is a wasteful number, since it uses less digits than its factorization.

2056978668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171414896 (or 171414894 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 57.

The square root of 2056978668 is about 45353.9267098230. The cubic root of 2056978668 is about 1271.7739625445.

The spelling of 2056978668 in words is "two billion, fifty-six million, nine hundred seventy-eight thousand, six hundred sixty-eight".