116618521 has 8 divisors (see below), whose sum is σ = 123807744. Its totient is φ = 109465920.

The previous prime is 116618507. The next prime is 116618543. The reversal of 116618521 is 125816611.

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

It is a cyclic number.

It is not a de Polignac number, because 116618521 - 2⁹ = 116618009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (116678521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2445 + ... + 15466.

It is an arithmetic number, because the mean of its divisors is an integer number (15475968).

Almost surely, 2^116618521 is an apocalyptic number.

It is an amenable number.

116618521 is a deficient number, since it is larger than the sum of its proper divisors (7189223).

116618521 is a wasteful number, since it uses less digits than its factorization.

116618521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18311.

The product of its digits is 2880, while the sum is 31.

The square root of 116618521 is about 10799.0055560686. The cubic root of 116618521 is about 488.5651779032.

The spelling of 116618521 in words is "one hundred sixteen million, six hundred eighteen thousand, five hundred twenty-one".