1789542557445 has 24 divisors (see below), whose sum is σ = 2879354138976. Its totient is φ = 949090472032.

The previous prime is 1789542557441. The next prime is 1789542557459. The reversal of 1789542557445 is 5447552459871.

It is not a de Polignac number, because 1789542557445 - 2² = 1789542557441 is a prime.

It is a super-2 number, since 2×1789542557445² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1789542557441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1381107 + ... + 2342336.

It is an arithmetic number, because the mean of its divisors is an integer number (119973089124).

Almost surely, 2^{1789542557445} is an apocalyptic number.

1789542557445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1789542557445 is a deficient number, since it is larger than the sum of its proper divisors (1089811581531).

1789542557445 is an equidigital number, since it uses as much as digits as its factorization.

1789542557445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3723809 (or 3723630 counting only the distinct ones).

The product of its digits is 282240000, while the sum is 66.

The spelling of 1789542557445 in words is "one trillion, seven hundred eighty-nine billion, five hundred forty-two million, five hundred fifty-seven thousand, four hundred forty-five".