87677118581 has 8 divisors (see below), whose sum is σ = 94656983064. Its totient is φ = 80730892800.

The previous prime is 87677118577. The next prime is 87677118601. The reversal of 87677118581 is 18581177678.

It can be written as a sum of positive squares in 4 ways, for example, as 14271886225 + 73405232356 = 119465^2 + 270934^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 87677118581 - 2² = 87677118577 is a prime.

It is a super-2 number, since 2×87677118581² (a number of 23 digits) contains 22 as substring.

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 87677118581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87677118541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8404256 + ... + 8414681.

It is an arithmetic number, because the mean of its divisors is an integer number (11832122883).

Almost surely, 2^87677118581 is an apocalyptic number.

It is an amenable number.

87677118581 is a deficient number, since it is larger than the sum of its proper divisors (6979864483).

87677118581 is a wasteful number, since it uses less digits than its factorization.

87677118581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16819351.

The product of its digits is 5268480, while the sum is 59.

The spelling of 87677118581 in words is "eighty-seven billion, six hundred seventy-seven million, one hundred eighteen thousand, five hundred eighty-one".