18257382465 has 32 divisors (see below), whose sum is σ = 33508171776. Its totient is φ = 8315421120.

The previous prime is 18257382461. The next prime is 18257382467. The reversal of 18257382465 is 56428375281.

It is not a de Polignac number, because 18257382465 - 2² = 18257382461 is a prime.

It is a super-4 number, since 4×18257382465⁴ (a number of 42 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (18257382461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 292357 + ... + 349266.

It is an arithmetic number, because the mean of its divisors is an integer number (1047130368).

Almost surely, 2^18257382465 is an apocalyptic number.

18257382465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18257382465 is a deficient number, since it is larger than the sum of its proper divisors (15250789311).

18257382465 is a wasteful number, since it uses less digits than its factorization.

18257382465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641909.

The product of its digits is 3225600, while the sum is 51.

The spelling of 18257382465 in words is "eighteen billion, two hundred fifty-seven million, three hundred eighty-two thousand, four hundred sixty-five".