2657344978 has 32 divisors (see below), whose sum is σ = 4264531200. Its totient is φ = 1238219136.

The previous prime is 2657344967. The next prime is 2657344979. The reversal of 2657344978 is 8794437562.

It is a super-2 number, since 2×2657344978² = 14122964664203640968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2657344979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1283328 + ... + 1285396.

It is an arithmetic number, because the mean of its divisors is an integer number (133266600).

Almost surely, 2^2657344978 is an apocalyptic number.

2657344978 is a deficient number, since it is larger than the sum of its proper divisors (1607186222).

2657344978 is a wasteful number, since it uses less digits than its factorization.

2657344978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2626.

The product of its digits is 10160640, while the sum is 55.

The square root of 2657344978 is about 51549.4420726355. The cubic root of 2657344978 is about 1385.1048377765.

The spelling of 2657344978 in words is "two billion, six hundred fifty-seven million, three hundred forty-four thousand, nine hundred seventy-eight".