87287157136 has 45 divisors (see below), whose sum is σ = 170385301891. Its totient is φ = 43319181056.

The previous prime is 87287157131. The next prime is 87287157161. The reversal of 87287157136 is 63175178278.

The square root of 87287157136 is 295444.

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

It can be written as a sum of positive squares in 4 ways, for example, as 50515259536 + 36771897600 = 224756^2 + 191760^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87287157131) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 275353650 + ... + 275353966.

Almost surely, 2^87287157136 is an apocalyptic number.

87287157136 is the 295444-th square number.

It is an amenable number.

87287157136 is a deficient number, since it is larger than the sum of its proper divisors (83098144755).

87287157136 is an frugal number, since it uses more digits than its factorization.

87287157136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108 (or 552 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 55.

The spelling of 87287157136 in words is "eighty-seven billion, two hundred eighty-seven million, one hundred fifty-seven thousand, one hundred thirty-six".