6764384731978 has 8 divisors (see below), whose sum is σ = 10743434574372. Its totient is φ = 3183239873856.

The previous prime is 6764384731933. The next prime is 6764384732009. The reversal of 6764384731978 is 8791374834676.

It can be written as a sum of positive squares in 2 ways, for example, as 6516752100849 + 247632631129 = 2552793^2 + 497627^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 6764384731978.

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, 99476246025 + ... + 99476246092.

Almost surely, 2^{6764384731978} is an apocalyptic number.

6764384731978 is a deficient number, since it is larger than the sum of its proper divisors (3979049842394).

6764384731978 is a wasteful number, since it uses less digits than its factorization.

6764384731978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198952492136.

The product of its digits is 1024192512, while the sum is 73.

The spelling of 6764384731978 in words is "six trillion, seven hundred sixty-four billion, three hundred eighty-four million, seven hundred thirty-one thousand, nine hundred seventy-eight".