1611106401 has 4 divisors (see below), whose sum is σ = 2148141872. Its totient is φ = 1074070932.

The previous prime is 1611106381. The next prime is 1611106403. The reversal of 1611106401 is 1046011161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-1611106401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1611106403) 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, 268517731 + ... + 268517736.

It is an arithmetic number, because the mean of its divisors is an integer number (537035468).

Almost surely, 2^1611106401 is an apocalyptic number.

It is an amenable number.

1611106401 is a deficient number, since it is larger than the sum of its proper divisors (537035471).

1611106401 is an equidigital number, since it uses as much as digits as its factorization.

1611106401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537035470.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 1611106401 is about 40138.5899229158. The cubic root of 1611106401 is about 1172.3071335773.

Adding to 1611106401 its reverse (1046011161), we get a palindrome (2657117562).

The spelling of 1611106401 in words is "one billion, six hundred eleven million, one hundred six thousand, four hundred one".