1512610661 has 4 divisors (see below), whose sum is σ = 1512769824. Its totient is φ = 1512451500.

The previous prime is 1512610651. The next prime is 1512610679. The reversal of 1512610661 is 1660162151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1512610661 - 2¹⁸ = 1512348517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1512610651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64355 + ... + 84656.

It is an arithmetic number, because the mean of its divisors is an integer number (378192456).

Almost surely, 2^1512610661 is an apocalyptic number.

It is an amenable number.

1512610661 is a deficient number, since it is larger than the sum of its proper divisors (159163).

1512610661 is a wasteful number, since it uses less digits than its factorization.

1512610661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159162.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1512610661 is about 38892.2956509384. The cubic root of 1512610661 is about 1147.9132063885.

The spelling of 1512610661 in words is "one billion, five hundred twelve million, six hundred ten thousand, six hundred sixty-one".