15149493949 has 2 divisors, whose sum is σ = 15149493950. Its totient is φ = 15149493948.

The previous prime is 15149493901. The next prime is 15149493967. The reversal of 15149493949 is 94939494151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15117932025 + 31561924 = 122955^2 + 5618^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15149493949 is a prime.

It is a super-2 number, since 2×15149493949² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15149493893 and 15149493902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15149493979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7574746974 + 7574746975.

It is an arithmetic number, because the mean of its divisors is an integer number (7574746975).

Almost surely, 2^15149493949 is an apocalyptic number.

It is an amenable number.

15149493949 is a deficient number, since it is larger than the sum of its proper divisors (1).

15149493949 is an equidigital number, since it uses as much as digits as its factorization.

15149493949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6298560, while the sum is 58.

The spelling of 15149493949 in words is "fifteen billion, one hundred forty-nine million, four hundred ninety-three thousand, nine hundred forty-nine".