1868054519 has 16 divisors (see below), whose sum is σ = 1919665440. Its totient is φ = 1817228160.

The previous prime is 1868054509. The next prime is 1868054533. The reversal of 1868054519 is 9154508681.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1868054519 is a prime.

It is a super-2 number, since 2×1868054519² = 6979255371912642722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868054509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4051949 + ... + 4052409.

It is an arithmetic number, because the mean of its divisors is an integer number (119979090).

Almost surely, 2^1868054519 is an apocalyptic number.

1868054519 is a deficient number, since it is larger than the sum of its proper divisors (51610921).

1868054519 is a wasteful number, since it uses less digits than its factorization.

1868054519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090.

The product of its (nonzero) digits is 345600, while the sum is 47.

The square root of 1868054519 is about 43220.9962749588. The cubic root of 1868054519 is about 1231.5815729125.

The spelling of 1868054519 in words is "one billion, eight hundred sixty-eight million, fifty-four thousand, five hundred nineteen".