1919116061 has 4 divisors (see below), whose sum is σ = 1955325852. Its totient is φ = 1882906272.

The previous prime is 1919116019. The next prime is 1919116103. The reversal of 1919116061 is 1606119191.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (1919116019) and next prime (1919116103).

It can be written as a sum of positive squares in 2 ways, for example, as 905648836 + 1013467225 = 30094^2 + 31835^2 .

It is a cyclic number.

It is not a de Polignac number, because 1919116061 - 2¹⁸ = 1918853917 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 (1919116861) 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, 18104816 + ... + 18104921.

It is an arithmetic number, because the mean of its divisors is an integer number (488831463).

Almost surely, 2^1919116061 is an apocalyptic number.

It is an amenable number.

1919116061 is a deficient number, since it is larger than the sum of its proper divisors (36209791).

1919116061 is an equidigital number, since it uses as much as digits as its factorization.

1919116061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36209790.

The product of its (nonzero) digits is 2916, while the sum is 35.

The square root of 1919116061 is about 43807.7169115214. The cubic root of 1919116061 is about 1242.7022367149.

The spelling of 1919116061 in words is "one billion, nine hundred nineteen million, one hundred sixteen thousand, sixty-one".