557520678 has 256 divisors, whose sum is σ = 1602478080. Its totient is φ = 141004800.

The previous prime is 557520581. The next prime is 557520697. The reversal of 557520678 is 876025755.

557520678 is a `hidden beast` number, since 5 + 57 + 520 + 6 + 78 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4069426 + ... + 4069562.

It is an arithmetic number, because the mean of its divisors is an integer number (6259680).

Almost surely, 2^557520678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 557520678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (801239040).

557520678 is an abundant number, since it is smaller than the sum of its proper divisors (1044957402).

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

557520678 is a wasteful number, since it uses less digits than its factorization.

557520678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 588000, while the sum is 45.

The square root of 557520678 is about 23611.8757831732. The cubic root of 557520678 is about 823.0388325697.

The spelling of 557520678 in words is "five hundred fifty-seven million, five hundred twenty thousand, six hundred seventy-eight".