76720054502671 has 4 divisors (see below), whose sum is σ = 76751796356352. Its totient is φ = 76688312648992.

The previous prime is 76720054502647. The next prime is 76720054502723. The reversal of 76720054502671 is 17620545002767.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76720054502671 is a prime.

It is a super-2 number, since 2×76720054502671² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76720054572671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15870923215 + ... + 15870928048.

It is an arithmetic number, because the mean of its divisors is an integer number (19187949089088).

Almost surely, 2^{76720054502671} is an apocalyptic number.

76720054502671 is a deficient number, since it is larger than the sum of its proper divisors (31741853681).

76720054502671 is a wasteful number, since it uses less digits than its factorization.

76720054502671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31741853680.

The product of its (nonzero) digits is 4939200, while the sum is 52.

The spelling of 76720054502671 in words is "seventy-six trillion, seven hundred twenty billion, fifty-four million, five hundred two thousand, six hundred seventy-one".