47387866191 has 16 divisors (see below), whose sum is σ = 64016176224. Its totient is φ = 31177580544.

The previous prime is 47387866159. The next prime is 47387866193. The reversal of 47387866191 is 19166878374.

It is not a de Polignac number, because 47387866191 - 2⁵ = 47387866159 is a prime.

It is a super-2 number, since 2×47387866191² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47387866193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127936 + ... + 333381.

It is an arithmetic number, because the mean of its divisors is an integer number (4001011014).

Almost surely, 2^47387866191 is an apocalyptic number.

47387866191 is a deficient number, since it is larger than the sum of its proper divisors (16628310033).

47387866191 is a wasteful number, since it uses less digits than its factorization.

47387866191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461770.

The product of its digits is 12192768, while the sum is 60.

The spelling of 47387866191 in words is "forty-seven billion, three hundred eighty-seven million, eight hundred sixty-six thousand, one hundred ninety-one".