47511356840 has 64 divisors (see below), whose sum is σ = 108761304960. Its totient is φ = 18675498240.

The previous prime is 47511356831. The next prime is 47511356909. The reversal of 47511356840 is 4865311574.

It is a Cunningham number, because it is equal to 217971²-1.

It is a junction number, because it is equal to n+sod(n) for n = 47511356791 and 47511356800.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 844634 + ... + 899126.

It is an arithmetic number, because the mean of its divisors is an integer number (1699395390).

Almost surely, 2^47511356840 is an apocalyptic number.

47511356840 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 47511356840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54380652480).

47511356840 is an abundant number, since it is smaller than the sum of its proper divisors (61249948120).

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

47511356840 is a wasteful number, since it uses less digits than its factorization.

47511356840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54882 (or 54878 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 47511356840 in words is "forty-seven billion, five hundred eleven million, three hundred fifty-six thousand, eight hundred forty".