47261890405 has 4 divisors (see below), whose sum is σ = 56714268492. Its totient is φ = 37809512320.

The previous prime is 47261890399. The next prime is 47261890421. The reversal of 47261890405 is 50409816274.

It is a Cunningham number, because it is equal to 217398²+1.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17014071844 + 30247818561 = 130438^2 + 173919^2 .

It is not a de Polignac number, because 47261890405 - 2²³ = 47253501797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4726189036 + ... + 4726189045.

It is an arithmetic number, because the mean of its divisors is an integer number (14178567123).

Almost surely, 2^47261890405 is an apocalyptic number.

It is an amenable number.

47261890405 is a deficient number, since it is larger than the sum of its proper divisors (9452378087).

47261890405 is an equidigital number, since it uses as much as digits as its factorization.

47261890405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9452378086.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 47261890405 in words is "forty-seven billion, two hundred sixty-one million, eight hundred ninety thousand, four hundred five".