47187191520 has 480 divisors, whose sum is σ = 191591725248. Its totient is φ = 10713710592.

The previous prime is 47187191497. The next prime is 47187191587. The reversal of 47187191520 is 2519178174.

It is a happy number.

47187191520 is a `hidden beast` number, since 47 + 1 + 87 + 1 + 9 + 1 + 520 = 666.

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

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

It is a congruent number.

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 79 ways as a sum of consecutive naturals, for example, 14241384 + ... + 14244696.

Almost surely, 2^47187191520 is an apocalyptic number.

47187191520 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 47187191520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95795862624).

47187191520 is an abundant number, since it is smaller than the sum of its proper divisors (144404533728).

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

47187191520 is a wasteful number, since it uses less digits than its factorization.

47187191520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3504 (or 3487 counting only the distinct ones).

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

It can be divided in two parts, 471871 and 91520, that added together give a triangular number (563391 = T₁₀₆₁).

The spelling of 47187191520 in words is "forty-seven billion, one hundred eighty-seven million, one hundred ninety-one thousand, five hundred twenty".