47117897640 has 320 divisors, whose sum is σ = 173322452160. Its totient is φ = 11385722880.

The previous prime is 47117897627. The next prime is 47117897653. The reversal of 47117897640 is 4679871174.

It is a happy number.

47117897640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (47117897627) and next prime (47117897653).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 12008719 + ... + 12012641.

It is an arithmetic number, because the mean of its divisors is an integer number (541632663).

Almost surely, 2^47117897640 is an apocalyptic number.

47117897640 is a gapful number since it is divisible by the number (40) 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 47117897640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86661226080).

47117897640 is an abundant number, since it is smaller than the sum of its proper divisors (126204554520).

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

47117897640 is a wasteful number, since it uses less digits than its factorization.

47117897640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4294 (or 4281 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 54.

The spelling of 47117897640 in words is "forty-seven billion, one hundred seventeen million, eight hundred ninety-seven thousand, six hundred forty".