1431641840639 has 4 divisors (see below), whose sum is σ = 1442570404440. Its totient is φ = 1420713276840.

The previous prime is 1431641840633. The next prime is 1431641840669. The reversal of 1431641840639 is 9360481461341.

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 1431641840639 - 2³² = 1427346873343 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 (1431641840633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5464281704 + ... + 5464281965.

It is an arithmetic number, because the mean of its divisors is an integer number (360642601110).

Almost surely, 2^{1431641840639} is an apocalyptic number.

1431641840639 is a deficient number, since it is larger than the sum of its proper divisors (10928563801).

1431641840639 is a wasteful number, since it uses less digits than its factorization.

1431641840639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10928563800.

The product of its (nonzero) digits is 1492992, while the sum is 50.

The spelling of 1431641840639 in words is "one trillion, four hundred thirty-one billion, six hundred forty-one million, eight hundred forty thousand, six hundred thirty-nine".