47623551821561 has 2 divisors, whose sum is σ = 47623551821562. Its totient is φ = 47623551821560.

The previous prime is 47623551821533. The next prime is 47623551821633. The reversal of 47623551821561 is 16512815532674.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41848931355625 + 5774620465936 = 6469075^2 + 2403044^2 .

It is a cyclic number.

It is not a de Polignac number, because 47623551821561 - 2¹⁴ = 47623551805177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 47623551821497 and 47623551821506.

It is not a weakly prime, because it can be changed into another prime (47623551821501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23811775910780 + 23811775910781.

It is an arithmetic number, because the mean of its divisors is an integer number (23811775910781).

Almost surely, 2^{47623551821561} is an apocalyptic number.

It is an amenable number.

47623551821561 is a deficient number, since it is larger than the sum of its proper divisors (1).

47623551821561 is an equidigital number, since it uses as much as digits as its factorization.

47623551821561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096000, while the sum is 56.

The spelling of 47623551821561 in words is "forty-seven trillion, six hundred twenty-three billion, five hundred fifty-one million, eight hundred twenty-one thousand, five hundred sixty-one".