53761978368 has 390 divisors, whose sum is σ = 186879925716. Its totient is φ = 15355920384.

The previous prime is 53761978363. The next prime is 53761978379. The reversal of 53761978368 is 86387916735.

53761978368 is a `hidden beast` number, since 5 + 3 + 7 + 619 + 7 + 8 + 3 + 6 + 8 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (53761978363) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 16255371 + ... + 16258677.

Almost surely, 2^53761978368 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 53761978368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93439962858).

53761978368 is an abundant number, since it is smaller than the sum of its proper divisors (133117947348).

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

53761978368 is an equidigital number, since it uses as much as digits as its factorization.

53761978368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3357 (or 3319 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The spelling of 53761978368 in words is "fifty-three billion, seven hundred sixty-one million, nine hundred seventy-eight thousand, three hundred sixty-eight".