47091838640 has 160 divisors (see below), whose sum is σ = 138376429056. Its totient is φ = 14476769280.

The previous prime is 47091838597. The next prime is 47091838649. The reversal of 47091838640 is 4683819074.

It is not an unprimeable number, because it can be changed into a prime (47091838649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 397319 + ... + 502041.

Almost surely, 2^47091838640 is an apocalyptic number.

47091838640 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 47091838640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69188214528).

47091838640 is an abundant number, since it is smaller than the sum of its proper divisors (91284590416).

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

47091838640 is a wasteful number, since it uses less digits than its factorization.

47091838640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104827 (or 104821 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 47091838640 in words is "forty-seven billion, ninety-one million, eight hundred thirty-eight thousand, six hundred forty".