18601613407 has 16 divisors (see below), whose sum is σ = 20468095200. Its totient is φ = 16800803712.

The previous prime is 18601613399. The next prime is 18601613411. The reversal of 18601613407 is 70431610681.

It is a cyclic number.

It is not a de Polignac number, because 18601613407 - 2³ = 18601613399 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 (18601613447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58113 + ... + 201445.

It is an arithmetic number, because the mean of its divisors is an integer number (1279255950).

Almost surely, 2^18601613407 is an apocalyptic number.

18601613407 is a deficient number, since it is larger than the sum of its proper divisors (1866481793).

18601613407 is a wasteful number, since it uses less digits than its factorization.

18601613407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143562.

The product of its (nonzero) digits is 24192, while the sum is 37.

The spelling of 18601613407 in words is "eighteen billion, six hundred one million, six hundred thirteen thousand, four hundred seven".