1613015660561 has 16 divisors (see below), whose sum is σ = 1664118374400. Its totient is φ = 1562310358848.

The previous prime is 1613015660549. The next prime is 1613015660587. The reversal of 1613015660561 is 1650665103161.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1613015660561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1613015660461) 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, 70000880 + ... + 70023918.

It is an arithmetic number, because the mean of its divisors is an integer number (104007398400).

Almost surely, 2^{1613015660561} is an apocalyptic number.

It is an amenable number.

1613015660561 is a deficient number, since it is larger than the sum of its proper divisors (51102713839).

1613015660561 is a wasteful number, since it uses less digits than its factorization.

1613015660561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31568.

The product of its (nonzero) digits is 97200, while the sum is 41.

The spelling of 1613015660561 in words is "one trillion, six hundred thirteen billion, fifteen million, six hundred sixty thousand, five hundred sixty-one".