1611996263 has 4 divisors (see below), whose sum is σ = 1618268880. Its totient is φ = 1605723648.

The previous prime is 1611996257. The next prime is 1611996299. The reversal of 1611996263 is 3626991161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3626991161 = 311 ⋅11662351.

It is a cyclic number.

It is not a de Polignac number, because 1611996263 - 2²⁴ = 1595219047 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 (1611996223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3135923 + ... + 3136436.

It is an arithmetic number, because the mean of its divisors is an integer number (404567220).

Almost surely, 2^1611996263 is an apocalyptic number.

1611996263 is a deficient number, since it is larger than the sum of its proper divisors (6272617).

1611996263 is an equidigital number, since it uses as much as digits as its factorization.

1611996263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6272616.

The product of its digits is 104976, while the sum is 44.

The square root of 1611996263 is about 40149.6732614351. The cubic root of 1611996263 is about 1172.5229272222.

The spelling of 1611996263 in words is "one billion, six hundred eleven million, nine hundred ninety-six thousand, two hundred sixty-three".