87208770815 has 32 divisors (see below), whose sum is σ = 112558844160. Its totient is φ = 64626338304.

The previous prime is 87208770811. The next prime is 87208770839. The reversal of 87208770815 is 51807780278.

It is not a de Polignac number, because 87208770815 - 2² = 87208770811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87208770811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7163924 + ... + 7176086.

It is an arithmetic number, because the mean of its divisors is an integer number (3517463880).

Almost surely, 2^87208770815 is an apocalyptic number.

87208770815 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

87208770815 is a deficient number, since it is larger than the sum of its proper divisors (25350073345).

87208770815 is a wasteful number, since it uses less digits than its factorization.

87208770815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13511.

The product of its (nonzero) digits is 1756160, while the sum is 53.

The spelling of 87208770815 in words is "eighty-seven billion, two hundred eight million, seven hundred seventy thousand, eight hundred fifteen".