2564602978 has 16 divisors (see below), whose sum is σ = 4515286464. Its totient is φ = 1069409520.

The previous prime is 2564602969. The next prime is 2564602979. The reversal of 2564602978 is 8792064652.

2564602978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2564602979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2474968 + ... + 2476003.

It is an arithmetic number, because the mean of its divisors is an integer number (282205404).

Almost surely, 2^2564602978 is an apocalyptic number.

2564602978 is a deficient number, since it is larger than the sum of its proper divisors (1950683486).

2564602978 is a wasteful number, since it uses less digits than its factorization.

2564602978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4951017.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The square root of 2564602978 is about 50641.9093044486. The cubic root of 2564602978 is about 1368.8001603547.

The spelling of 2564602978 in words is "two billion, five hundred sixty-four million, six hundred two thousand, nine hundred seventy-eight".