87177971763 has 16 divisors (see below), whose sum is σ = 132643161760. Its totient is φ = 56547872928.

The previous prime is 87177971759. The next prime is 87177971801. The reversal of 87177971763 is 36717977178.

It is not a de Polignac number, because 87177971763 - 2² = 87177971759 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87177971763.

It is not an unprimeable number, because it can be changed into a prime (87177971063) 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, 43631620 + ... + 43633617.

It is an arithmetic number, because the mean of its divisors is an integer number (8290197610).

Almost surely, 2^87177971763 is an apocalyptic number.

87177971763 is a deficient number, since it is larger than the sum of its proper divisors (45465189997).

87177971763 is a wasteful number, since it uses less digits than its factorization.

87177971763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87265283 (or 87265277 counting only the distinct ones).

The product of its digits is 21781872, while the sum is 63.

The spelling of 87177971763 in words is "eighty-seven billion, one hundred seventy-seven million, nine hundred seventy-one thousand, seven hundred sixty-three".