15494148809 has 2 divisors, whose sum is σ = 15494148810. Its totient is φ = 15494148808.

The previous prime is 15494148767. The next prime is 15494148847. The reversal of 15494148809 is 90884149451.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12596695225 + 2897453584 = 112235^2 + 53828^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15494148809 is a prime.

It is a super-2 number, since 2×15494148809² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15494048809) 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, 7747074404 + 7747074405.

It is an arithmetic number, because the mean of its divisors is an integer number (7747074405).

Almost surely, 2^15494148809 is an apocalyptic number.

It is an amenable number.

15494148809 is a deficient number, since it is larger than the sum of its proper divisors (1).

15494148809 is an equidigital number, since it uses as much as digits as its factorization.

15494148809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 15494148809 in words is "fifteen billion, four hundred ninety-four million, one hundred forty-eight thousand, eight hundred nine".