4064561978 has 24 divisors (see below), whose sum is σ = 6528967956. Its totient is φ = 1896488000.

The previous prime is 4064561957. The next prime is 4064561989. The reversal of 4064561978 is 8791654604.

It can be written as a sum of positive squares in 2 ways, for example, as 4061895289 + 2666689 = 63733^2 + 1633^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3473 + ... + 90228.

Almost surely, 2^4064561978 is an apocalyptic number.

4064561978 is a deficient number, since it is larger than the sum of its proper divisors (2464405978).

4064561978 is a wasteful number, since it uses less digits than its factorization.

4064561978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93790 (or 93767 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 4064561978 is about 63753.9173541517. The cubic root of 4064561978 is about 1595.8959897399.

The spelling of 4064561978 in words is "four billion, sixty-four million, five hundred sixty-one thousand, nine hundred seventy-eight".