47691731880 has 256 divisors, whose sum is σ = 178645824000. Its totient is φ = 11229014016.

The previous prime is 47691731873. The next prime is 47691731897. The reversal of 47691731880 is 8813719674.

47691731880 is a `hidden beast` number, since 476 + 91 + 7 + 3 + 1 + 8 + 80 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

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 63 ways as a sum of consecutive naturals, for example, 249076 + ... + 396764.

It is an arithmetic number, because the mean of its divisors is an integer number (697835250).

Almost surely, 2^47691731880 is an apocalyptic number.

47691731880 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 47691731880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89322912000).

47691731880 is an abundant number, since it is smaller than the sum of its proper divisors (130954092120).

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

47691731880 is a wasteful number, since it uses less digits than its factorization.

47691731880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147745 (or 147735 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The spelling of 47691731880 in words is "forty-seven billion, six hundred ninety-one million, seven hundred thirty-one thousand, eight hundred eighty".