1510561610661 has 16 divisors (see below), whose sum is σ = 2134762971264. Its totient is φ = 946823184384.

The previous prime is 1510561610659. The next prime is 1510561610671. The reversal of 1510561610661 is 1660161650151.

It is not a de Polignac number, because 1510561610661 - 2¹ = 1510561610659 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1510561610611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15265500 + ... + 15364133.

It is an arithmetic number, because the mean of its divisors is an integer number (133422685704).

Almost surely, 2^{1510561610661} is an apocalyptic number.

It is an amenable number.

1510561610661 is a deficient number, since it is larger than the sum of its proper divisors (624201360603).

1510561610661 is a wasteful number, since it uses less digits than its factorization.

1510561610661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30630620.

The product of its (nonzero) digits is 32400, while the sum is 39.

The spelling of 1510561610661 in words is "one trillion, five hundred ten billion, five hundred sixty-one million, six hundred ten thousand, six hundred sixty-one".