53921990736 has 320 divisors, whose sum is σ = 170046259200. Its totient is φ = 16286054400.

The previous prime is 53921990723. The next prime is 53921990741. The reversal of 53921990736 is 63709912935.

It is a happy number.

53921990736 is a `hidden beast` number, since 539 + 2 + 19 + 90 + 7 + 3 + 6 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54411201 + ... + 54412191.

It is an arithmetic number, because the mean of its divisors is an integer number (531394560).

Almost surely, 2^53921990736 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 53921990736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85023129600).

53921990736 is an abundant number, since it is smaller than the sum of its proper divisors (116124268464).

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

53921990736 is a wasteful number, since it uses less digits than its factorization.

53921990736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295 (or 1283 counting only the distinct ones).

The product of its (nonzero) digits is 2755620, while the sum is 54.

The spelling of 53921990736 in words is "fifty-three billion, nine hundred twenty-one million, nine hundred ninety thousand, seven hundred thirty-six".