557161780 has 48 divisors (see below), whose sum is σ = 1359872640. Its totient is φ = 187786368.

The previous prime is 557161771. The next prime is 557161789. The reversal of 557161780 is 87161755.

It is an interprime number because it is at equal distance from previous prime (557161771) and next prime (557161789).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557161789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25467 + ... + 41986.

It is an arithmetic number, because the mean of its divisors is an integer number (28330680).

Almost surely, 2^557161780 is an apocalyptic number.

It is an amenable number.

557161780 is an abundant number, since it is smaller than the sum of its proper divisors (802710860).

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

557161780 is a wasteful number, since it uses less digits than its factorization.

557161780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67528 (or 67526 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 40.

The square root of 557161780 is about 23604.2746128747. The cubic root of 557161780 is about 822.8621871648.

The spelling of 557161780 in words is "five hundred fifty-seven million, one hundred sixty-one thousand, seven hundred eighty".