1511660606561 has 16 divisors (see below), whose sum is σ = 1801143679104. Its totient is φ = 1241697510144.

The previous prime is 1511660606539. The next prime is 1511660606593. The reversal of 1511660606561 is 1656060661151.

It is not a de Polignac number, because 1511660606561 - 2¹⁰ = 1511660605537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1511660686561) 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, 47362616 + ... + 47394521.

It is an arithmetic number, because the mean of its divisors is an integer number (112571479944).

Almost surely, 2^{1511660606561} is an apocalyptic number.

It is an amenable number.

1511660606561 is a deficient number, since it is larger than the sum of its proper divisors (289483072543).

1511660606561 is an equidigital number, since it uses as much as digits as its factorization.

1511660606561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94757240.

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 1511660606561 in words is "one trillion, five hundred eleven billion, six hundred sixty million, six hundred six thousand, five hundred sixty-one".