1512967661 has 2 divisors, whose sum is σ = 1512967662. Its totient is φ = 1512967660.

The previous prime is 1512967619. The next prime is 1512967681. The reversal of 1512967661 is 1667692151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 836655625 + 676312036 = 28925^2 + 26006^2 .

It is a cyclic number.

It is not a de Polignac number, because 1512967661 - 2¹⁸ = 1512705517 is a prime.

It is a super-2 number, since 2×1512967661² = 4578142286463621842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1512967681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756483830 + 756483831.

It is an arithmetic number, because the mean of its divisors is an integer number (756483831).

Almost surely, 2^1512967661 is an apocalyptic number.

It is an amenable number.

1512967661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1512967661 is an equidigital number, since it uses as much as digits as its factorization.

1512967661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 44.

The square root of 1512967661 is about 38896.8849781059. The cubic root of 1512967661 is about 1148.0035078320.

The spelling of 1512967661 in words is "one billion, five hundred twelve million, nine hundred sixty-seven thousand, six hundred sixty-one".