653478779520 has 256 divisors, whose sum is σ = 2645033644800. Its totient is φ = 149366550528.

The previous prime is 653478779501. The next prime is 653478779531. The reversal of 653478779520 is 25977874356.

653478779520 is a `hidden beast` number, since 6 + 5 + 3 + 478 + 77 + 95 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 31 ways as a sum of consecutive naturals, for example, 2580259 + ... + 2822178.

It is an arithmetic number, because the mean of its divisors is an integer number (10332162675).

Almost surely, 2^653478779520 is an apocalyptic number.

653478779520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

653478779520 is an abundant number, since it is smaller than the sum of its proper divisors (1991554865280).

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

653478779520 is a wasteful number, since it uses less digits than its factorization.

653478779520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5402472 (or 5402454 counting only the distinct ones).

The product of its (nonzero) digits is 88905600, while the sum is 63.

The spelling of 653478779520 in words is "six hundred fifty-three billion, four hundred seventy-eight million, seven hundred seventy-nine thousand, five hundred twenty".