47951181720 has 192 divisors, whose sum is σ = 169152721920. Its totient is φ = 11710282752.

The previous prime is 47951181713. The next prime is 47951181721. The reversal of 47951181720 is 2718115974.

It is a happy number.

47951181720 is a `hidden beast` number, since 479 + 5 + 1 + 1 + 8 + 172 + 0 = 666.

It is a super-3 number, since 3×47951181720³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47951181721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 554022 + ... + 634698.

It is an arithmetic number, because the mean of its divisors is an integer number (881003760).

Almost surely, 2^47951181720 is an apocalyptic number.

47951181720 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 47951181720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84576360960).

47951181720 is an abundant number, since it is smaller than the sum of its proper divisors (121201540200).

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

47951181720 is a wasteful number, since it uses less digits than its factorization.

47951181720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80834 (or 80827 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The spelling of 47951181720 in words is "forty-seven billion, nine hundred fifty-one million, one hundred eighty-one thousand, seven hundred twenty".