47644945920 has 480 divisors, whose sum is σ = 193868779104. Its totient is φ = 10661068800.

The previous prime is 47644945903. The next prime is 47644945937. The reversal of 47644945920 is 2954944674.

47644945920 is a `hidden beast` number, since 4 + 7 + 6 + 4 + 49 + 4 + 592 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (47644945903) and next prime (47644945937).

It is a tau number, because it is divible by the number of its divisors (480).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3287490 + ... + 3301950.

Almost surely, 2^47644945920 is an apocalyptic number.

47644945920 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 47644945920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96934389552).

47644945920 is an abundant number, since it is smaller than the sum of its proper divisors (146223833184).

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

47644945920 is a wasteful number, since it uses less digits than its factorization.

47644945920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14514 (or 14495 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 54.

The spelling of 47644945920 in words is "forty-seven billion, six hundred forty-four million, nine hundred forty-five thousand, nine hundred twenty".