7351689618 has 432 divisors, whose sum is σ = 21765908736. Its totient is φ = 1783192320.

The previous prime is 7351689613. The next prime is 7351689619. The reversal of 7351689618 is 8169861537.

7351689618 is a `hidden beast` number, since 7 + 3 + 5 + 16 + 8 + 9 + 618 = 666.

It is not an unprimeable number, because it can be changed into a prime (7351689613) by changing a digit.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 170969505 + ... + 170969547.

It is an arithmetic number, because the mean of its divisors is an integer number (50384048).

Almost surely, 2^7351689618 is an apocalyptic number.

7351689618 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 7351689618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10882954368).

7351689618 is an abundant number, since it is smaller than the sum of its proper divisors (14414219118).

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

7351689618 is a wasteful number, since it uses less digits than its factorization.

7351689618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 136 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 7351689618 is about 85741.9944834502. The cubic root of 7351689618 is about 1944.4452585360.

The spelling of 7351689618 in words is "seven billion, three hundred fifty-one million, six hundred eighty-nine thousand, six hundred eighteen".