47145531664 has 80 divisors (see below), whose sum is σ = 114638662656. Its totient is φ = 18246672000.

The previous prime is 47145531647. The next prime is 47145531679. The reversal of 47145531664 is 46613554174.

It is a happy number.

47145531664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59319 + ... + 312745.

Almost surely, 2^47145531664 is an apocalyptic number.

47145531664 is a gapful number since it is divisible by the number (44) 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 47145531664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57319331328).

47145531664 is an abundant number, since it is smaller than the sum of its proper divisors (67493130992).

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

47145531664 is a wasteful number, since it uses less digits than its factorization.

47145531664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253604 (or 253598 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 46.

The spelling of 47145531664 in words is "forty-seven billion, one hundred forty-five million, five hundred thirty-one thousand, six hundred sixty-four".