76644664107520 has 160 divisors (see below), whose sum is σ = 187253531631936. Its totient is φ = 30079948800000.

The previous prime is 76644664107493. The next prime is 76644664107527. The reversal of 76644664107520 is 2570146644667.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (160).

It is not an unprimeable number, because it can be changed into a prime (76644664107527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42161370 + ... + 43941670.

Almost surely, 2^{76644664107520} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 76644664107520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93626765815968).

76644664107520 is an abundant number, since it is smaller than the sum of its proper divisors (110608867524416).

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

76644664107520 is a wasteful number, since it uses less digits than its factorization.

76644664107520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780642 (or 1780626 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 58.

The spelling of 76644664107520 in words is "seventy-six trillion, six hundred forty-four billion, six hundred sixty-four million, one hundred seven thousand, five hundred twenty".