53998534656 has 480 divisors, whose sum is σ = 177979858560. Its totient is φ = 16243752960.

The previous prime is 53998534649. The next prime is 53998534663. The reversal of 53998534656 is 65643589935.

53998534656 is a `hidden beast` number, since 5 + 3 + 9 + 98 + 534 + 6 + 5 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (53998534649) and next prime (53998534663).

It is a junction number, because it is equal to n+sod(n) for n = 53998534593 and 53998534602.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 394149820 + ... + 394149956.

It is an arithmetic number, because the mean of its divisors is an integer number (370791372).

Almost surely, 2^53998534656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53998534656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88989929280).

53998534656 is an abundant number, since it is smaller than the sum of its proper divisors (123981323904).

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

53998534656 is an frugal number, since it uses more digits than its factorization.

53998534656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 153 counting only the distinct ones).

The product of its digits is 104976000, while the sum is 63.

The spelling of 53998534656 in words is "fifty-three billion, nine hundred ninety-eight million, five hundred thirty-four thousand, six hundred fifty-six".