15643014461 has 2 divisors, whose sum is σ = 15643014462. Its totient is φ = 15643014460.

The previous prime is 15643014427. The next prime is 15643014467. The reversal of 15643014461 is 16441034651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15402299236 + 240715225 = 124106^2 + 15515^2 .

It is a cyclic number.

It is not a de Polignac number, because 15643014461 - 2⁶ = 15643014397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15643014467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7821507230 + 7821507231.

It is an arithmetic number, because the mean of its divisors is an integer number (7821507231).

Almost surely, 2^15643014461 is an apocalyptic number.

It is an amenable number.

15643014461 is a deficient number, since it is larger than the sum of its proper divisors (1).

15643014461 is an equidigital number, since it uses as much as digits as its factorization.

15643014461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 15643014461 in words is "fifteen billion, six hundred forty-three million, fourteen thousand, four hundred sixty-one".