76721677388672 has 64 divisors (see below), whose sum is σ = 158117832129600. Its totient is φ = 37037258496000.

The previous prime is 76721677388663. The next prime is 76721677388689. The reversal of 76721677388672 is 27688377612767.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 76721677388593 and 76721677388602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196916297 + ... + 197305527.

It is an arithmetic number, because the mean of its divisors is an integer number (2470591127025).

Almost surely, 2^{76721677388672} is an apocalyptic number.

It is an amenable number.

76721677388672 is an abundant number, since it is smaller than the sum of its proper divisors (81396154740928).

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

76721677388672 is a wasteful number, since it uses less digits than its factorization.

76721677388672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442375 (or 442363 counting only the distinct ones).

The product of its digits is 2788079616, while the sum is 77.

The spelling of 76721677388672 in words is "seventy-six trillion, seven hundred twenty-one billion, six hundred seventy-seven million, three hundred eighty-eight thousand, six hundred seventy-two".