18155254610465 has 64 divisors (see below), whose sum is σ = 25683299389440. Its totient is φ = 12064514945280.

The previous prime is 18155254610453. The next prime is 18155254610473. The reversal of 18155254610465 is 56401645255181.

It is not a de Polignac number, because 18155254610465 - 2¹⁸ = 18155254348321 is a prime.

It is a super-2 number, since 2×18155254610465² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40408826 + ... + 40855644.

It is an arithmetic number, because the mean of its divisors is an integer number (401301552960).

Almost surely, 2^{18155254610465} is an apocalyptic number.

It is an amenable number.

18155254610465 is a deficient number, since it is larger than the sum of its proper divisors (7528044778975).

18155254610465 is a wasteful number, since it uses less digits than its factorization.

18155254610465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447182.

The product of its (nonzero) digits is 5760000, while the sum is 53.

The spelling of 18155254610465 in words is "eighteen trillion, one hundred fifty-five billion, two hundred fifty-four million, six hundred ten thousand, four hundred sixty-five".