1840272019451 has 2 divisors, whose sum is σ = 1840272019452. Its totient is φ = 1840272019450.

The previous prime is 1840272019427. The next prime is 1840272019511. The reversal of 1840272019451 is 1549102720481.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1840272019451 is a prime.

It is a super-2 number, since 2×1840272019451² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1840272019351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 920136009725 + 920136009726.

It is an arithmetic number, because the mean of its divisors is an integer number (920136009726).

Almost surely, 2^{1840272019451} is an apocalyptic number.

1840272019451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1840272019451 is an equidigital number, since it uses as much as digits as its factorization.

1840272019451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 44.

The spelling of 1840272019451 in words is "one trillion, eight hundred forty billion, two hundred seventy-two million, nineteen thousand, four hundred fifty-one".