1872425945389 has 4 divisors (see below), whose sum is σ = 1873212350940. Its totient is φ = 1871639539840.

The previous prime is 1872425945371. The next prime is 1872425945431. The reversal of 1872425945389 is 9835495242781.

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

It can be written as a sum of positive squares in 2 ways, for example, as 568108912900 + 1304317032489 = 753730^2 + 1142067^2 .

It is a cyclic number.

It is not a de Polignac number, because 1872425945389 - 2¹³ = 1872425937197 is a prime.

It is a super-2 number, since 2×1872425945389² (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 (1872425945329) 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, 393199204 + ... + 393203965.

It is an arithmetic number, because the mean of its divisors is an integer number (468303087735).

Almost surely, 2^{1872425945389} is an apocalyptic number.

It is an amenable number.

1872425945389 is a deficient number, since it is larger than the sum of its proper divisors (786405551).

1872425945389 is an equidigital number, since it uses as much as digits as its factorization.

1872425945389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786405550.

The product of its digits is 174182400, while the sum is 67.

The spelling of 1872425945389 in words is "one trillion, eight hundred seventy-two billion, four hundred twenty-five million, nine hundred forty-five thousand, three hundred eighty-nine".