15201661723 has 2 divisors, whose sum is σ = 15201661724. Its totient is φ = 15201661722.

The previous prime is 15201661669. The next prime is 15201661729. The reversal of 15201661723 is 32716610251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15201661723 - 2¹⁷ = 15201530651 is a prime.

It is not a weakly prime, because it can be changed into another prime (15201661729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7600830861 + 7600830862.

It is an arithmetic number, because the mean of its divisors is an integer number (7600830862).

Almost surely, 2^15201661723 is an apocalyptic number.

15201661723 is a deficient number, since it is larger than the sum of its proper divisors (1).

15201661723 is an equidigital number, since it uses as much as digits as its factorization.

15201661723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 15201661723 in words is "fifteen billion, two hundred one million, six hundred sixty-one thousand, seven hundred twenty-three".