18165525948 has 72 divisors (see below), whose sum is σ = 49460576256. Its totient is φ = 5605063200.

The previous prime is 18165525929. The next prime is 18165526007. The reversal of 18165525948 is 84952556181.

18165525948 is a `hidden beast` number, since 1 + 81 + 6 + 552 + 5 + 9 + 4 + 8 = 666.

It is a super-2 number, since 2×18165525948² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18165525894 and 18165525903.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 328188 + ... + 379523.

It is an arithmetic number, because the mean of its divisors is an integer number (686952448).

Almost surely, 2^18165525948 is an apocalyptic number.

18165525948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18165525948 is an abundant number, since it is smaller than the sum of its proper divisors (31295050308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18165525948 is a wasteful number, since it uses less digits than its factorization.

18165525948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707775 (or 707770 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 54.

It can be divided in two parts, 1816552 and 5948, that added together give a square (1822500 = 1350²).

The spelling of 18165525948 in words is "eighteen billion, one hundred sixty-five million, five hundred twenty-five thousand, nine hundred forty-eight".