57178398438 has 96 divisors (see below), whose sum is σ = 143378164800. Its totient is φ = 16130838528.

The previous prime is 57178398427. The next prime is 57178398449. The reversal of 57178398438 is 83489387175.

It is an interprime number because it is at equal distance from previous prime (57178398427) and next prime (57178398449).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3822558 + ... + 3837486.

It is an arithmetic number, because the mean of its divisors is an integer number (1493522550).

Almost surely, 2^57178398438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57178398438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71689082400).

57178398438 is an abundant number, since it is smaller than the sum of its proper divisors (86199766362).

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

57178398438 is a wasteful number, since it uses less digits than its factorization.

57178398438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15326 (or 15323 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 63.

The spelling of 57178398438 in words is "fifty-seven billion, one hundred seventy-eight million, three hundred ninety-eight thousand, four hundred thirty-eight".