653079978 has 12 divisors (see below), whose sum is σ = 1415006658. Its totient is φ = 217693320.

The previous prime is 653079967. The next prime is 653080003. The reversal of 653079978 is 879970356.

It can be written as a sum of positive squares in only one way, i.e., 460231209 + 192848769 = 21453^2 + 13887^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18141093 + ... + 18141128.

Almost surely, 2^653079978 is an apocalyptic number.

653079978 is an abundant number, since it is smaller than the sum of its proper divisors (761926680).

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

653079978 is a wasteful number, since it uses less digits than its factorization.

653079978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36282229 (or 36282226 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The square root of 653079978 is about 25555.4295209453. The cubic root of 653079978 is about 867.6051537553.

The spelling of 653079978 in words is "six hundred fifty-three million, seventy-nine thousand, nine hundred seventy-eight".