1611516026243 has 4 divisors (see below), whose sum is σ = 1611543660720. Its totient is φ = 1611488391768.

The previous prime is 1611516026189. The next prime is 1611516026251. The reversal of 1611516026243 is 3426206151161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1611516026243 - 2²⁸ = 1611247590787 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1611516026197 and 1611516026206.

It is not an unprimeable number, because it can be changed into a prime (1611516022243) 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, 13729580 + ... + 13846457.

It is an arithmetic number, because the mean of its divisors is an integer number (402885915180).

Almost surely, 2^{1611516026243} is an apocalyptic number.

1611516026243 is a deficient number, since it is larger than the sum of its proper divisors (27634477).

1611516026243 is an equidigital number, since it uses as much as digits as its factorization.

1611516026243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27634476.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 1611516026243 in words is "one trillion, six hundred eleven billion, five hundred sixteen million, twenty-six thousand, two hundred forty-three".