18495649536 has 288 divisors, whose sum is σ = 62546792448. Its totient is φ = 4720066560.

The previous prime is 18495649531. The next prime is 18495649547. The reversal of 18495649536 is 63594659481.

It is a self number, because there is not a number n which added to its sum of digits gives 18495649536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18495649531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2162260 + ... + 2170796.

Almost surely, 2^18495649536 is an apocalyptic number.

18495649536 is a gapful number since it is divisible by the number (16) 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 18495649536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31273396224).

18495649536 is an abundant number, since it is smaller than the sum of its proper divisors (44051142912).

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

18495649536 is a wasteful number, since it uses less digits than its factorization.

18495649536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8607 (or 8593 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 60.

The spelling of 18495649536 in words is "eighteen billion, four hundred ninety-five million, six hundred forty-nine thousand, five hundred thirty-six".