47186685681 has 24 divisors (see below), whose sum is σ = 68990179584. Its totient is φ = 28652240640.

The previous prime is 47186685677. The next prime is 47186685727. The reversal of 47186685681 is 18658668174.

It is a happy number.

It is not a de Polignac number, because 47186685681 - 2² = 47186685677 is a prime.

It is a super-2 number, since 2×47186685681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47186685661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 850950 + ... + 904703.

It is an arithmetic number, because the mean of its divisors is an integer number (2874590816).

Almost surely, 2^47186685681 is an apocalyptic number.

It is an amenable number.

47186685681 is a deficient number, since it is larger than the sum of its proper divisors (21803493903).

47186685681 is a wasteful number, since it uses less digits than its factorization.

47186685681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1755721 (or 1755704 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 60.

The spelling of 47186685681 in words is "forty-seven billion, one hundred eighty-six million, six hundred eighty-five thousand, six hundred eighty-one".