53178577920 has 704 divisors, whose sum is σ = 206007459840. Its totient is φ = 12931301376.

The previous prime is 53178577853. The next prime is 53178577927. The reversal of 53178577920 is 2977587135.

It is a happy number.

53178577920 is a `hidden beast` number, since 53 + 17 + 8 + 577 + 9 + 2 + 0 = 666.

It is a super-2 number, since 2×53178577920² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53178577927) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 228234124 + ... + 228234356.

Almost surely, 2^53178577920 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 53178577920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103003729920).

53178577920 is an abundant number, since it is smaller than the sum of its proper divisors (152828881920).

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

53178577920 is a wasteful number, since it uses less digits than its factorization.

53178577920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 3704400, while the sum is 54.

The spelling of 53178577920 in words is "fifty-three billion, one hundred seventy-eight million, five hundred seventy-seven thousand, nine hundred twenty".