18119782749 has 8 divisors (see below), whose sum is σ = 24198000832. Its totient is φ = 12060709920.

The previous prime is 18119782739. The next prime is 18119782787. The reversal of 18119782749 is 94728791181.

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

It is not a de Polignac number, because 18119782749 - 2⁸ = 18119782493 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 (18119782739) 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, 4784104 + ... + 4787889.

It is an arithmetic number, because the mean of its divisors is an integer number (3024750104).

Almost surely, 2^18119782749 is an apocalyptic number.

It is an amenable number.

18119782749 is a deficient number, since it is larger than the sum of its proper divisors (6078218083).

18119782749 is an equidigital number, since it uses as much as digits as its factorization.

18119782749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9572627.

The product of its digits is 2032128, while the sum is 57.

The spelling of 18119782749 in words is "eighteen billion, one hundred nineteen million, seven hundred eighty-two thousand, seven hundred forty-nine".