1840434278431 has 4 divisors (see below), whose sum is σ = 2103353461072. Its totient is φ = 1577515095792.

The previous prime is 1840434278429. The next prime is 1840434278471. The reversal of 1840434278431 is 1348724340481.

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

It is a cyclic number.

It is not a de Polignac number, because 1840434278431 - 2¹ = 1840434278429 is a prime.

It is a super-2 number, since 2×1840434278431² (a number of 25 digits) 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 (1840434278471) 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, 131459591310 + ... + 131459591323.

It is an arithmetic number, because the mean of its divisors is an integer number (525838365268).

Almost surely, 2^{1840434278431} is an apocalyptic number.

1840434278431 is a deficient number, since it is larger than the sum of its proper divisors (262919182641).

1840434278431 is an equidigital number, since it uses as much as digits as its factorization.

1840434278431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262919182640.

The product of its (nonzero) digits is 2064384, while the sum is 49.

The spelling of 1840434278431 in words is "one trillion, eight hundred forty billion, four hundred thirty-four million, two hundred seventy-eight thousand, four hundred thirty-one".