87218397493862 has 4 divisors (see below), whose sum is σ = 130827596240796. Its totient is φ = 43609198746930.

The previous prime is 87218397493847. The next prime is 87218397493891. The reversal of 87218397493862 is 26839479381278.

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

It is a super-2 number, since 2×87218397493862² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21804599373464 + ... + 21804599373467.

It is an arithmetic number, because the mean of its divisors is an integer number (32706899060199).

Almost surely, 2^{87218397493862} is an apocalyptic number.

87218397493862 is a deficient number, since it is larger than the sum of its proper divisors (43609198746934).

87218397493862 is a wasteful number, since it uses less digits than its factorization.

87218397493862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43609198746933.

The product of its digits is 1755758592, while the sum is 77.

The spelling of 87218397493862 in words is "eighty-seven trillion, two hundred eighteen billion, three hundred ninety-seven million, four hundred ninety-three thousand, eight hundred sixty-two".