87717220474 has 16 divisors (see below), whose sum is σ = 143157846888. Its totient is φ = 40067500032.

The previous prime is 87717220463. The next prime is 87717220519. The reversal of 87717220474 is 47402271778.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 53840241225 + 33876979249 = 232035^2 + 184057^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17387887 + ... + 17392930.

Almost surely, 2^87717220474 is an apocalyptic number.

87717220474 is a deficient number, since it is larger than the sum of its proper divisors (55440626414).

87717220474 is a wasteful number, since it uses less digits than its factorization.

87717220474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34780929.

The product of its (nonzero) digits is 1229312, while the sum is 49.

The spelling of 87717220474 in words is "eighty-seven billion, seven hundred seventeen million, two hundred twenty thousand, four hundred seventy-four".