57781848638 has 4 divisors (see below), whose sum is σ = 86672772960. Its totient is φ = 28890924318.

The previous prime is 57781848587. The next prime is 57781848659. The reversal of 57781848638 is 83684818775.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14445462158 + ... + 14445462161.

It is an arithmetic number, because the mean of its divisors is an integer number (21668193240).

Almost surely, 2^57781848638 is an apocalyptic number.

57781848638 is a deficient number, since it is larger than the sum of its proper divisors (28890924322).

57781848638 is a wasteful number, since it uses less digits than its factorization.

57781848638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28890924321.

The product of its digits is 72253440, while the sum is 65.

The spelling of 57781848638 in words is "fifty-seven billion, seven hundred eighty-one million, eight hundred forty-eight thousand, six hundred thirty-eight".