57878515264639 has 4 divisors (see below), whose sum is σ = 57882448045224. Its totient is φ = 57874582484056.

The previous prime is 57878515264579. The next prime is 57878515264667. The reversal of 57878515264639 is 93646251587875.

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

It is a cyclic number.

It is not a de Polignac number, because 57878515264639 - 2¹⁷ = 57878515133567 is a prime.

It is a Smith number, since the sum of its digits (76) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57878515364639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1966368217 + ... + 1966397650.

It is an arithmetic number, because the mean of its divisors is an integer number (14470612011306).

Almost surely, 2^{57878515264639} is an apocalyptic number.

57878515264639 is a deficient number, since it is larger than the sum of its proper divisors (3932780585).

57878515264639 is a wasteful number, since it uses less digits than its factorization.

57878515264639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3932780584.

The product of its digits is 3048192000, while the sum is 76.

The spelling of 57878515264639 in words is "fifty-seven trillion, eight hundred seventy-eight billion, five hundred fifteen million, two hundred sixty-four thousand, six hundred thirty-nine".