77649386915634 has 8 divisors (see below), whose sum is σ = 155298773831280. Its totient is φ = 25883128971876.

The previous prime is 77649386915599. The next prime is 77649386915647. The reversal of 77649386915634 is 43651968394677.

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

77649386915634 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 77649386915634.

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, 6470782242964 + ... + 6470782242975.

It is an arithmetic number, because the mean of its divisors is an integer number (19412346728910).

Almost surely, 2^{77649386915634} is an apocalyptic number.

77649386915634 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

77649386915634 is a wasteful number, since it uses less digits than its factorization.

77649386915634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12941564485944.

The product of its digits is 4938071040, while the sum is 78.

The spelling of 77649386915634 in words is "seventy-seven trillion, six hundred forty-nine billion, three hundred eighty-six million, nine hundred fifteen thousand, six hundred thirty-four".