15315963149 has 2 divisors, whose sum is σ = 15315963150. Its totient is φ = 15315963148.

The previous prime is 15315963121. The next prime is 15315963233. The reversal of 15315963149 is 94136951351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15315795049 + 168100 = 123757^2 + 410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15315963149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15315963109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7657981574 + 7657981575.

It is an arithmetic number, because the mean of its divisors is an integer number (7657981575).

Almost surely, 2^15315963149 is an apocalyptic number.

It is an amenable number.

15315963149 is a deficient number, since it is larger than the sum of its proper divisors (1).

15315963149 is an equidigital number, since it uses as much as digits as its factorization.

15315963149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 437400, while the sum is 47.

The spelling of 15315963149 in words is "fifteen billion, three hundred fifteen million, nine hundred sixty-three thousand, one hundred forty-nine".