75819691856 has 10 divisors (see below), whose sum is σ = 146900653002. Its totient is φ = 37909845920.

The previous prime is 75819691847. The next prime is 75819691861. The reversal of 75819691856 is 65819691857.

It can be written as a sum of positive squares in only one way, i.e., 68967163456 + 6852528400 = 262616^2 + 82780^2 .

It is a junction number, because it is equal to n+sod(n) for n = 75819691792 and 75819691801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2369365355 + ... + 2369365386.

Almost surely, 2^75819691856 is an apocalyptic number.

It is an amenable number.

75819691856 is a deficient number, since it is larger than the sum of its proper divisors (71080961146).

75819691856 is a wasteful number, since it uses less digits than its factorization.

75819691856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4738730749 (or 4738730743 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 65.

Subtracting from 75819691856 its reverse (65819691857), we obtain a palindrome (9999999999).

The spelling of 75819691856 in words is "seventy-five billion, eight hundred nineteen million, six hundred ninety-one thousand, eight hundred fifty-six".