653793978239 has 16 divisors (see below), whose sum is σ = 689543366400. Its totient is φ = 618179190336.

The previous prime is 653793978223. The next prime is 653793978241. The reversal of 653793978239 is 932879397356.

It is a cyclic number.

It is not a de Polignac number, because 653793978239 - 2⁴ = 653793978223 is a prime.

It is a super-2 number, since 2×653793978239² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653793978269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45072662 + ... + 45087164.

It is an arithmetic number, because the mean of its divisors is an integer number (43096460400).

Almost surely, 2^653793978239 is an apocalyptic number.

653793978239 is a deficient number, since it is larger than the sum of its proper divisors (35749388161).

653793978239 is a wasteful number, since it uses less digits than its factorization.

653793978239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18974.

The product of its digits is 462944160, while the sum is 71.

The spelling of 653793978239 in words is "six hundred fifty-three billion, seven hundred ninety-three million, nine hundred seventy-eight thousand, two hundred thirty-nine".