18637097931641 has 8 divisors (see below), whose sum is σ = 22420568940480. Its totient is φ = 15133884034608.

The previous prime is 18637097931607. The next prime is 18637097931659. The reversal of 18637097931641 is 14613979073681.

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 18637097931641 - 2²² = 18637093737337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18637097931541) 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, 70064277806 + ... + 70064278071.

It is an arithmetic number, because the mean of its divisors is an integer number (2802571117560).

Almost surely, 2^{18637097931641} is an apocalyptic number.

It is an amenable number.

18637097931641 is a deficient number, since it is larger than the sum of its proper divisors (3783471008839).

18637097931641 is a wasteful number, since it uses less digits than its factorization.

18637097931641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140128555903.

The product of its (nonzero) digits is 41150592, while the sum is 65.

The spelling of 18637097931641 in words is "eighteen trillion, six hundred thirty-seven billion, ninety-seven million, nine hundred thirty-one thousand, six hundred forty-one".