18715379365249 has 8 divisors (see below), whose sum is σ = 21389143591040. Its totient is φ = 16041649790016.

The previous prime is 18715379365213. The next prime is 18715379365271. The reversal of 18715379365249 is 94256397351781.

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 18715379365249 - 2²¹ = 18715377268097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18715379335249) 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, 7494744 + ... + 9674809.

It is an arithmetic number, because the mean of its divisors is an integer number (2673642948880).

Almost surely, 2^{18715379365249} is an apocalyptic number.

It is an amenable number.

18715379365249 is a deficient number, since it is larger than the sum of its proper divisors (2673764225791).

18715379365249 is a wasteful number, since it uses less digits than its factorization.

18715379365249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17325279.

The product of its digits is 342921600, while the sum is 70.

The spelling of 18715379365249 in words is "eighteen trillion, seven hundred fifteen billion, three hundred seventy-nine million, three hundred sixty-five thousand, two hundred forty-nine".