57861165780 has 480 divisors, whose sum is σ = 209355632640. Its totient is φ = 13239832320.

The previous prime is 57861165737. The next prime is 57861165821. The reversal of 57861165780 is 8756116875.

57861165780 is a `hidden beast` number, since 5 + 7 + 8 + 61 + 1 + 6 + 578 + 0 = 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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 32378047 + ... + 32379833.

It is an arithmetic number, because the mean of its divisors is an integer number (436157568).

Almost surely, 2^57861165780 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 57861165780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104677816320).

57861165780 is an abundant number, since it is smaller than the sum of its proper divisors (151494466860).

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

57861165780 is a wasteful number, since it uses less digits than its factorization.

57861165780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921 (or 1910 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 54.

The spelling of 57861165780 in words is "fifty-seven billion, eight hundred sixty-one million, one hundred sixty-five thousand, seven hundred eighty".