57736642638 has 8 divisors (see below), whose sum is σ = 115473285288. Its totient is φ = 19245547544.

The previous prime is 57736642573. The next prime is 57736642643. The reversal of 57736642638 is 83624663775.

57736642638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

57736642638 is an admirable number.

It is a super-4 number, since 4×57736642638⁴ (a number of 44 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4811386881 + ... + 4811386892.

It is an arithmetic number, because the mean of its divisors is an integer number (14434160661).

Almost surely, 2^57736642638 is an apocalyptic number.

57736642638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

57736642638 is a wasteful number, since it uses less digits than its factorization.

57736642638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9622773778.

The product of its digits is 30481920, while the sum is 57.

The spelling of 57736642638 in words is "fifty-seven billion, seven hundred thirty-six million, six hundred forty-two thousand, six hundred thirty-eight".