87905559407 has 4 divisors (see below), whose sum is σ = 88282836720. Its totient is φ = 87528282096.

The previous prime is 87905559367. The next prime is 87905559419. The reversal of 87905559407 is 70495550978.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87905559407 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 (87905559487) 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, 188638307 + ... + 188638772.

It is an arithmetic number, because the mean of its divisors is an integer number (22070709180).

Almost surely, 2^87905559407 is an apocalyptic number.

87905559407 is a deficient number, since it is larger than the sum of its proper divisors (377277313).

87905559407 is a wasteful number, since it uses less digits than its factorization.

87905559407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377277312.

The product of its (nonzero) digits is 15876000, while the sum is 59.

The spelling of 87905559407 in words is "eighty-seven billion, nine hundred five million, five hundred fifty-nine thousand, four hundred seven".