18449725510944 has 480 divisors, whose sum is σ = 70710049339776. Its totient is φ = 4579633520640.

The previous prime is 18449725510943. The next prime is 18449725510963. The reversal of 18449725510944 is 44901552794481.

18449725510944 is a `hidden beast` number, since 1 + 8 + 4 + 4 + 9 + 7 + 25 + 510 + 94 + 4 = 666.

It is a super-2 number, since 2×18449725510944² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (18449725510943) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1709259 + ... + 6310389.

Almost surely, 2^{18449725510944} is an apocalyptic number.

18449725510944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18449725510944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35355024669888).

18449725510944 is an abundant number, since it is smaller than the sum of its proper divisors (52260323828832).

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

18449725510944 is a wasteful number, since it uses less digits than its factorization.

18449725510944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4601190 (or 4601173 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 63.

The spelling of 18449725510944 in words is "eighteen trillion, four hundred forty-nine billion, seven hundred twenty-five million, five hundred ten thousand, nine hundred forty-four".