653234974920 has 320 divisors, whose sum is σ = 2536091078400. Its totient is φ = 149044561920.

The previous prime is 653234974859. The next prime is 653234974921. The reversal of 653234974920 is 29479432356.

653234974920 is a `hidden beast` number, since 6 + 5 + 32 + 34 + 97 + 492 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (653234974921) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 66801 + ... + 1144959.

It is an arithmetic number, because the mean of its divisors is an integer number (7925284620).

Almost surely, 2^653234974920 is an apocalyptic number.

653234974920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 653234974920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1268045539200).

653234974920 is an abundant number, since it is smaller than the sum of its proper divisors (1882856103480).

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

653234974920 is a wasteful number, since it uses less digits than its factorization.

653234974920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078210 (or 1078197 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 54.

The spelling of 653234974920 in words is "six hundred fifty-three billion, two hundred thirty-four million, nine hundred seventy-four thousand, nine hundred twenty".