7955888640 has 320 divisors, whose sum is σ = 29434116096. Its totient is φ = 1795571712.

The previous prime is 7955888627. The next prime is 7955888693. The reversal of 7955888640 is 468885597.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4461189 + ... + 4462971.

Almost surely, 2^7955888640 is an apocalyptic number.

7955888640 is a gapful number since it is divisible by the number (70) 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 7955888640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14717058048).

7955888640 is an abundant number, since it is smaller than the sum of its proper divisors (21478227456).

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

7955888640 is a wasteful number, since it uses less digits than its factorization.

7955888640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899 (or 1883 counting only the distinct ones).

The product of its (nonzero) digits is 19353600, while the sum is 60.

The square root of 7955888640 is about 89195.7882413738. The cubic root of 7955888640 is about 1996.3172762685.

The spelling of 7955888640 in words is "seven billion, nine hundred fifty-five million, eight hundred eighty-eight thousand, six hundred forty".