47501765861 has 4 divisors (see below), whose sum is σ = 51820108224. Its totient is φ = 43183423500.

The previous prime is 47501765821. The next prime is 47501765863. The reversal of 47501765861 is 16856710574.

It is a happy number.

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 47501765861 - 2⁶ = 47501765797 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 (47501765863) 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, 2159171165 + ... + 2159171186.

It is an arithmetic number, because the mean of its divisors is an integer number (12955027056).

Almost surely, 2^47501765861 is an apocalyptic number.

It is an amenable number.

47501765861 is a deficient number, since it is larger than the sum of its proper divisors (4318342363).

47501765861 is a wasteful number, since it uses less digits than its factorization.

47501765861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4318342362.

The product of its (nonzero) digits is 1411200, while the sum is 50.

The spelling of 47501765861 in words is "forty-seven billion, five hundred one million, seven hundred sixty-five thousand, eight hundred sixty-one".