1864259428139 has 4 divisors (see below), whose sum is σ = 1864262471856. Its totient is φ = 1864256384424.

The previous prime is 1864259428133. The next prime is 1864259428159. The reversal of 1864259428139 is 9318249524681.

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 1864259428139 - 2³² = 1859964460843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1864259428133) 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, 247304 + ... + 1946709.

It is an arithmetic number, because the mean of its divisors is an integer number (466065617964).

Almost surely, 2^{1864259428139} is an apocalyptic number.

1864259428139 is a deficient number, since it is larger than the sum of its proper divisors (3043717).

1864259428139 is an equidigital number, since it uses as much as digits as its factorization.

1864259428139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3043716.

The product of its digits is 29859840, while the sum is 62.

The spelling of 1864259428139 in words is "one trillion, eight hundred sixty-four billion, two hundred fifty-nine million, four hundred twenty-eight thousand, one hundred thirty-nine".