116521187905 has 8 divisors (see below), whose sum is σ = 139833727272. Its totient is φ = 93211415808.

The previous prime is 116521187837. The next prime is 116521187953. The reversal of 116521187905 is 509781125611.

It is a Cunningham number, because it is equal to 341352²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 41947955344 + 74573232561 = 204812^2 + 273081^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-116521187905 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 598024 + ... + 768553.

It is an arithmetic number, because the mean of its divisors is an integer number (17479215909).

Almost surely, 2^116521187905 is an apocalyptic number.

It is an amenable number.

116521187905 is a deficient number, since it is larger than the sum of its proper divisors (23312539367).

116521187905 is a wasteful number, since it uses less digits than its factorization.

116521187905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383635.

The product of its (nonzero) digits is 151200, while the sum is 46.

The spelling of 116521187905 in words is "one hundred sixteen billion, five hundred twenty-one million, one hundred eighty-seven thousand, nine hundred five".