47581865523557 has 4 divisors (see below), whose sum is σ = 47581897762080. Its totient is φ = 47581833285036.

The previous prime is 47581865523529. The next prime is 47581865523601. The reversal of 47581865523557 is 75532556818574.

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 47581865523557 - 2¹⁶ = 47581865458021 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 (47581865523757) 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, 13793507 + ... + 16894512.

It is an arithmetic number, because the mean of its divisors is an integer number (11895474440520).

Almost surely, 2^{47581865523557} is an apocalyptic number.

It is an amenable number.

47581865523557 is a deficient number, since it is larger than the sum of its proper divisors (32238523).

47581865523557 is a wasteful number, since it uses less digits than its factorization.

47581865523557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32238522.

The product of its digits is 1411200000, while the sum is 71.

The spelling of 47581865523557 in words is "forty-seven trillion, five hundred eighty-one billion, eight hundred sixty-five million, five hundred twenty-three thousand, five hundred fifty-seven".