87701637605 has 4 divisors (see below), whose sum is σ = 105241965132. Its totient is φ = 70161310080.

The previous prime is 87701637601. The next prime is 87701637607. The reversal of 87701637605 is 50673610778.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38831461249 + 48870176356 = 197057^2 + 221066^2 .

It is not a de Polignac number, because 87701637605 - 2² = 87701637601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87701637601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8770163756 + ... + 8770163765.

It is an arithmetic number, because the mean of its divisors is an integer number (26310491283).

Almost surely, 2^87701637605 is an apocalyptic number.

It is an amenable number.

87701637605 is a deficient number, since it is larger than the sum of its proper divisors (17540327527).

87701637605 is a wasteful number, since it uses less digits than its factorization.

87701637605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17540327526.

The product of its (nonzero) digits is 1481760, while the sum is 50.

The spelling of 87701637605 in words is "eighty-seven billion, seven hundred one million, six hundred thirty-seven thousand, six hundred five".