57787678774 has 80 divisors (see below), whose sum is σ = 106855522848. Its totient is φ = 22956051456.

The previous prime is 57787678747. The next prime is 57787678777. The reversal of 57787678774 is 47787678775.

It is a Harshad number since it is a multiple of its sum of digits (73).

It is a junction number, because it is equal to n+sod(n) for n = 57787678697 and 57787678706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57787678777) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 85358124 + ... + 85358800.

Almost surely, 2^57787678774 is an apocalyptic number.

57787678774 is a deficient number, since it is larger than the sum of its proper divisors (49067844074).

57787678774 is an frugal number, since it uses more digits than its factorization.

57787678774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827 (or 776 counting only the distinct ones).

The product of its digits is 903544320, while the sum is 73.

Subtracting from 57787678774 its reverse (47787678775), we obtain a palindrome (9999999999).

The spelling of 57787678774 in words is "fifty-seven billion, seven hundred eighty-seven million, six hundred seventy-eight thousand, seven hundred seventy-four".