87434941636 has 27 divisors (see below), whose sum is σ = 178000987437. Its totient is φ = 37470343680.

The previous prime is 87434941613. The next prime is 87434941729. The reversal of 87434941636 is 63614943478.

The square root of 87434941636 is 295694.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 64062647236 + 23372294400 = 253106^2 + 152880^2 .

It is an alternating number because its digits alternate between even and odd.

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 8 ways as a sum of consecutive naturals, for example, 4129156 + ... + 4150276.

Almost surely, 2^87434941636 is an apocalyptic number.

87434941636 is the 295694-th square number.

It is an amenable number.

87434941636 is an abundant number, since it is smaller than the sum of its proper divisors (90566045801).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87434941636 is an frugal number, since it uses more digits than its factorization.

87434941636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42260 (or 21130 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 55.

The spelling of 87434941636 in words is "eighty-seven billion, four hundred thirty-four million, nine hundred forty-one thousand, six hundred thirty-six".