47405377581 has 4 divisors (see below), whose sum is σ = 63207170112. Its totient is φ = 31603585052.

The previous prime is 47405377573. The next prime is 47405377603. The reversal of 47405377581 is 18577350474.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 47405377581 - 2³ = 47405377573 is a prime.

It is a super-2 number, since 2×47405377581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47405377571) 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, 7900896261 + ... + 7900896266.

It is an arithmetic number, because the mean of its divisors is an integer number (15801792528).

Almost surely, 2^47405377581 is an apocalyptic number.

It is an amenable number.

47405377581 is a deficient number, since it is larger than the sum of its proper divisors (15801792531).

47405377581 is a wasteful number, since it uses less digits than its factorization.

47405377581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15801792530.

The product of its (nonzero) digits is 3292800, while the sum is 51.

The spelling of 47405377581 in words is "forty-seven billion, four hundred five million, three hundred seventy-seven thousand, five hundred eighty-one".