57781387242 has 24 divisors (see below), whose sum is σ = 125199416160. Its totient is φ = 19259476200.

The previous prime is 57781387201. The next prime is 57781387247. The reversal of 57781387242 is 24278318775.

It is not an unprimeable number, because it can be changed into a prime (57781387247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 336859 + ... + 478577.

It is an arithmetic number, because the mean of its divisors is an integer number (5216642340).

Almost surely, 2^57781387242 is an apocalyptic number.

57781387242 is an abundant number, since it is smaller than the sum of its proper divisors (67418028918).

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

57781387242 is a wasteful number, since it uses less digits than its factorization.

57781387242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164378 (or 164375 counting only the distinct ones).

The product of its digits is 5268480, while the sum is 54.

The spelling of 57781387242 in words is "fifty-seven billion, seven hundred eighty-one million, three hundred eighty-seven thousand, two hundred forty-two".