32913225618 has 128 divisors (see below), whose sum is σ = 83839795200. Its totient is φ = 8557657920.

The previous prime is 32913225617. The next prime is 32913225619. The reversal of 32913225618 is 81652231923.

It is an interprime number because it is at equal distance from previous prime (32913225617) and next prime (32913225619).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 32913225618.

It is not an unprimeable number, because it can be changed into a prime (32913225617) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1890871 + ... + 1908197.

It is an arithmetic number, because the mean of its divisors is an integer number (654998400).

Almost surely, 2^32913225618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 32913225618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41919897600).

32913225618 is an abundant number, since it is smaller than the sum of its proper divisors (50926569582).

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

32913225618 is a wasteful number, since it uses less digits than its factorization.

32913225618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17437 (or 17423 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The spelling of 32913225618 in words is "thirty-two billion, nine hundred thirteen million, two hundred twenty-five thousand, six hundred eighteen".