47121961837 has 4 divisors (see below), whose sum is σ = 47607755356. Its totient is φ = 46636168320.

The previous prime is 47121961829. The next prime is 47121961849. The reversal of 47121961837 is 73816912174.

47121961837 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 37553013796 + 9568948041 = 193786^2 + 97821^2 .

It is a cyclic number.

It is not a de Polignac number, because 47121961837 - 2³ = 47121961829 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 (47121971837) 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, 242896614 + ... + 242896807.

It is an arithmetic number, because the mean of its divisors is an integer number (11901938839).

Almost surely, 2^47121961837 is an apocalyptic number.

It is an amenable number.

47121961837 is a deficient number, since it is larger than the sum of its proper divisors (485793519).

47121961837 is an equidigital number, since it uses as much as digits as its factorization.

47121961837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485793518.

The product of its digits is 508032, while the sum is 49.

The spelling of 47121961837 in words is "forty-seven billion, one hundred twenty-one million, nine hundred sixty-one thousand, eight hundred thirty-seven".