47891876538 has 16 divisors (see below), whose sum is σ = 104491367136. Its totient is φ = 14512689840.

The previous prime is 47891876537. The next prime is 47891876561. The reversal of 47891876538 is 83567819874.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 725634493 = 47891876538 / (4 + 7 + 8 + 9 + 1 + 8 + 7 + 6 + 5 + 3 + 8).

It is not an unprimeable number, because it can be changed into a prime (47891876537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362817181 + ... + 362817312.

It is an arithmetic number, because the mean of its divisors is an integer number (6530710446).

Almost surely, 2^47891876538 is an apocalyptic number.

47891876538 is an abundant number, since it is smaller than the sum of its proper divisors (56599490598).

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

47891876538 is a wasteful number, since it uses less digits than its factorization.

47891876538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725634509.

The product of its digits is 81285120, while the sum is 66.

It can be divided in two parts, 47891 and 876538, that added together give a palindrome (924429).

The spelling of 47891876538 in words is "forty-seven billion, eight hundred ninety-one million, eight hundred seventy-six thousand, five hundred thirty-eight".