47206181477621 has 4 divisors (see below), whose sum is σ = 47206211076492. Its totient is φ = 47206151878752.

The previous prime is 47206181477479. The next prime is 47206181477659. The reversal of 47206181477621 is 12677418160274.

It is a happy number.

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 6005508976996 + 41200672500625 = 2450614^2 + 6418775^2 .

It is a cyclic number.

It is not a de Polignac number, because 47206181477621 - 2¹⁴ = 47206181461237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47206181477821) 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, 12262136 + ... + 15645201.

It is an arithmetic number, because the mean of its divisors is an integer number (11801552769123).

Almost surely, 2^{47206181477621} is an apocalyptic number.

It is an amenable number.

47206181477621 is a deficient number, since it is larger than the sum of its proper divisors (29598871).

47206181477621 is a wasteful number, since it uses less digits than its factorization.

47206181477621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29598870.

The product of its (nonzero) digits is 6322176, while the sum is 56.

The spelling of 47206181477621 in words is "forty-seven trillion, two hundred six billion, one hundred eighty-one million, four hundred seventy-seven thousand, six hundred twenty-one".