18345248777 has 16 divisors (see below), whose sum is σ = 19665923904. Its totient is φ = 17052672000.

The previous prime is 18345248767. The next prime is 18345248833. The reversal of 18345248777 is 77784254381.

It is a cyclic number.

It is not a de Polignac number, because 18345248777 - 2¹² = 18345244681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18345248767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 450377 + ... + 489417.

It is an arithmetic number, because the mean of its divisors is an integer number (1229120244).

Almost surely, 2^18345248777 is an apocalyptic number.

18345248777 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

18345248777 is a deficient number, since it is larger than the sum of its proper divisors (1320675127).

18345248777 is a wasteful number, since it uses less digits than its factorization.

18345248777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39400.

The product of its digits is 10536960, while the sum is 56.

The spelling of 18345248777 in words is "eighteen billion, three hundred forty-five million, two hundred forty-eight thousand, seven hundred seventy-seven".