766284138636 has 12 divisors (see below), whose sum is σ = 1787996323512. Its totient is φ = 255428046208.

The previous prime is 766284138589. The next prime is 766284138643. The reversal of 766284138636 is 636831482667.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×766284138636² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 766284138636.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31928505765 + ... + 31928505788.

It is an arithmetic number, because the mean of its divisors is an integer number (148999693626).

Almost surely, 2^766284138636 is an apocalyptic number.

It is an amenable number.

766284138636 is an abundant number, since it is smaller than the sum of its proper divisors (1021712184876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

766284138636 is a wasteful number, since it uses less digits than its factorization.

766284138636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63857011560 (or 63857011558 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 60.

The spelling of 766284138636 in words is "seven hundred sixty-six billion, two hundred eighty-four million, one hundred thirty-eight thousand, six hundred thirty-six".