57728951707 has 4 divisors (see below), whose sum is σ = 65975944816. Its totient is φ = 49481958600.

The previous prime is 57728951671. The next prime is 57728951741. The reversal of 57728951707 is 70715982775.

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 57728951707 - 2²⁷ = 57594733979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57728921707) 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, 4123496544 + ... + 4123496557.

It is an arithmetic number, because the mean of its divisors is an integer number (16493986204).

Almost surely, 2^57728951707 is an apocalyptic number.

57728951707 is a deficient number, since it is larger than the sum of its proper divisors (8246993109).

57728951707 is an equidigital number, since it uses as much as digits as its factorization.

57728951707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8246993108.

The product of its (nonzero) digits is 8643600, while the sum is 58.

The spelling of 57728951707 in words is "fifty-seven billion, seven hundred twenty-eight million, nine hundred fifty-one thousand, seven hundred seven".