87157416506 has 4 divisors (see below), whose sum is σ = 130736124762. Its totient is φ = 43578708252.

The previous prime is 87157416503. The next prime is 87157416529. The reversal of 87157416506 is 60561475178.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 52826885281 + 34330531225 = 229841^2 + 185285^2 .

It is a super-2 number, since 2×87157416506² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87157416503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21789354125 + ... + 21789354128.

Almost surely, 2^87157416506 is an apocalyptic number.

87157416506 is a deficient number, since it is larger than the sum of its proper divisors (43578708256).

87157416506 is a wasteful number, since it uses less digits than its factorization.

87157416506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43578708255.

The product of its (nonzero) digits is 1411200, while the sum is 50.

The spelling of 87157416506 in words is "eighty-seven billion, one hundred fifty-seven million, four hundred sixteen thousand, five hundred six".