1911860045 has 8 divisors (see below), whose sum is σ = 2296162296. Its totient is φ = 1528201216.

The previous prime is 1911860039. The next prime is 1911860051. The reversal of 1911860045 is 5400681191.

It is an interprime number because it is at equal distance from previous prime (1911860039) and next prime (1911860051).

It can be written as a sum of positive squares in 4 ways, for example, as 67930564 + 1843929481 = 8242^2 + 42941^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1911860045 - 2¹⁶ = 1911794509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1911859987 and 1911860014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154292 + ... + 166221.

It is an arithmetic number, because the mean of its divisors is an integer number (287020287).

Almost surely, 2^1911860045 is an apocalyptic number.

It is an amenable number.

1911860045 is a deficient number, since it is larger than the sum of its proper divisors (384302251).

1911860045 is a wasteful number, since it uses less digits than its factorization.

1911860045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321711.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 1911860045 is about 43724.8218406891. The cubic root of 1911860045 is about 1241.1340745656.

The spelling of 1911860045 in words is "one billion, nine hundred eleven million, eight hundred sixty thousand, forty-five".