870009661399 has 16 divisors (see below), whose sum is σ = 900539640000. Its totient is φ = 839925411840.

The previous prime is 870009661333. The next prime is 870009661463. The reversal of 870009661399 is 993166900078.

It is a cyclic number.

It is not a de Polignac number, because 870009661399 - 2³³ = 861419726807 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 (870009661799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53534227 + ... + 53550475.

It is an arithmetic number, because the mean of its divisors is an integer number (56283727500).

Almost surely, 2^870009661399 is an apocalyptic number.

870009661399 is a deficient number, since it is larger than the sum of its proper divisors (30529978601).

870009661399 is a wasteful number, since it uses less digits than its factorization.

870009661399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29850.

The product of its (nonzero) digits is 4408992, while the sum is 58.

The spelling of 870009661399 in words is "eight hundred seventy billion, nine million, six hundred sixty-one thousand, three hundred ninety-nine".