87447705994 has 12 divisors (see below), whose sum is σ = 144180309042. Its totient is φ = 39748957160.

The previous prime is 87447705967. The next prime is 87447705997. The reversal of 87447705994 is 49950774478.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 86369568769 + 1078137225 = 293887^2 + 32835^2 .

It is a super-2 number, since 2×87447705994² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87447705997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 180676837 + ... + 180677320.

Almost surely, 2^87447705994 is an apocalyptic number.

87447705994 is a deficient number, since it is larger than the sum of its proper divisors (56732603048).

87447705994 is a wasteful number, since it uses less digits than its factorization.

87447705994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361354181 (or 361354170 counting only the distinct ones).

The product of its (nonzero) digits is 71124480, while the sum is 64.

The spelling of 87447705994 in words is "eighty-seven billion, four hundred forty-seven million, seven hundred five thousand, nine hundred ninety-four".