57771491487 has 8 divisors (see below), whose sum is σ = 77037148080. Its totient is φ = 38510081280.

The previous prime is 57771491483. The next prime is 57771491507. The reversal of 57771491487 is 78419417775.

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

It is not a de Polignac number, because 57771491487 - 2² = 57771491483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57771491487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57771491483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1029714 + ... + 1084367.

It is an arithmetic number, because the mean of its divisors is an integer number (9629643510).

Almost surely, 2^57771491487 is an apocalyptic number.

57771491487 is a deficient number, since it is larger than the sum of its proper divisors (19265656593).

57771491487 is a wasteful number, since it uses less digits than its factorization.

57771491487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123193.

The product of its digits is 13829760, while the sum is 60.

The spelling of 57771491487 in words is "fifty-seven billion, seven hundred seventy-one million, four hundred ninety-one thousand, four hundred eighty-seven".