653896978 has 16 divisors (see below), whose sum is σ = 1126661184. Its totient is φ = 278817840.

The previous prime is 653896961. The next prime is 653896979. The reversal of 653896978 is 879698356.

It is not an unprimeable number, because it can be changed into a prime (653896979) 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, 115788 + ... + 121303.

It is an arithmetic number, because the mean of its divisors is an integer number (70416324).

Almost surely, 2^653896978 is an apocalyptic number.

653896978 is a deficient number, since it is larger than the sum of its proper divisors (472764206).

653896978 is a wasteful number, since it uses less digits than its factorization.

653896978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237297.

The product of its digits is 19595520, while the sum is 61.

The square root of 653896978 is about 25571.4093862657. The cubic root of 653896978 is about 867.9667929915.

The spelling of 653896978 in words is "six hundred fifty-three million, eight hundred ninety-six thousand, nine hundred seventy-eight".