1611011413261 has 8 divisors (see below), whose sum is σ = 1613749737600. Its totient is φ = 1608274668000.

The previous prime is 1611011413237. The next prime is 1611011413343. The reversal of 1611011413261 is 1623141101161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1611011413261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611011417261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1656450 + ... + 2442508.

It is an arithmetic number, because the mean of its divisors is an integer number (201718717200).

Almost surely, 2^{1611011413261} is an apocalyptic number.

It is an amenable number.

1611011413261 is a deficient number, since it is larger than the sum of its proper divisors (2738324339).

1611011413261 is an equidigital number, since it uses as much as digits as its factorization.

1611011413261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789539.

The product of its (nonzero) digits is 864, while the sum is 28.

The spelling of 1611011413261 in words is "one trillion, six hundred eleven billion, eleven million, four hundred thirteen thousand, two hundred sixty-one".