18159961417 has 48 divisors (see below), whose sum is σ = 21484024320. Its totient is φ = 15284505600.

The previous prime is 18159961411. The next prime is 18159961439. The reversal of 18159961417 is 71416995181.

It is a happy number.

It is not a de Polignac number, because 18159961417 - 2¹⁹ = 18159437129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18159961411) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23989003 + ... + 23989759.

It is an arithmetic number, because the mean of its divisors is an integer number (447583840).

Almost surely, 2^18159961417 is an apocalyptic number.

It is an amenable number.

18159961417 is a deficient number, since it is larger than the sum of its proper divisors (3324062903).

18159961417 is a wasteful number, since it uses less digits than its factorization.

18159961417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074 (or 1061 counting only the distinct ones).

The product of its digits is 544320, while the sum is 52.

The spelling of 18159961417 in words is "eighteen billion, one hundred fifty-nine million, nine hundred sixty-one thousand, four hundred seventeen".