57145870840 has 128 divisors (see below), whose sum is σ = 136045578240. Its totient is φ = 21560495616.

The previous prime is 57145870811. The next prime is 57145870843. The reversal of 57145870840 is 4807854175.

57145870840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57145870843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24920734 + ... + 24923026.

It is an arithmetic number, because the mean of its divisors is an integer number (1062856080).

Almost surely, 2^57145870840 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 57145870840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68022789120).

57145870840 is an abundant number, since it is smaller than the sum of its proper divisors (78899707400).

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

57145870840 is a wasteful number, since it uses less digits than its factorization.

57145870840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2693 (or 2689 counting only the distinct ones).

The product of its (nonzero) digits is 1254400, while the sum is 49.

The spelling of 57145870840 in words is "fifty-seven billion, one hundred forty-five million, eight hundred seventy thousand, eight hundred forty".