8965918640 has 80 divisors (see below), whose sum is σ = 23856568320. Its totient is φ = 3069792000.

The previous prime is 8965918613. The next prime is 8965918667. The reversal of 8965918640 is 468195698.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8965918613) and next prime (8965918667).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 409901 + ... + 431219.

It is an arithmetic number, because the mean of its divisors is an integer number (298207104).

Almost surely, 2^8965918640 is an apocalyptic number.

8965918640 is a gapful number since it is divisible by the number (80) 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 8965918640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11928284160).

8965918640 is an abundant number, since it is smaller than the sum of its proper divisors (14890649680).

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

8965918640 is a wasteful number, since it uses less digits than its factorization.

8965918640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22090 (or 22084 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 56.

The square root of 8965918640 is about 94688.5348920343. The cubic root of 8965918640 is about 2077.4548689973.

The spelling of 8965918640 in words is "eight billion, nine hundred sixty-five million, nine hundred eighteen thousand, six hundred forty".