47138994551 has 4 divisors (see below), whose sum is σ = 51424357704. Its totient is φ = 42853631400.

The previous prime is 47138994521. The next prime is 47138994589. The reversal of 47138994551 is 15549983174.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47138994551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47138994521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2142681560 + ... + 2142681581.

It is an arithmetic number, because the mean of its divisors is an integer number (12856089426).

Almost surely, 2^47138994551 is an apocalyptic number.

47138994551 is a deficient number, since it is larger than the sum of its proper divisors (4285363153).

47138994551 is a wasteful number, since it uses less digits than its factorization.

47138994551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4285363152.

The product of its digits is 5443200, while the sum is 56.

The spelling of 47138994551 in words is "forty-seven billion, one hundred thirty-eight million, nine hundred ninety-four thousand, five hundred fifty-one".