1828555458172 has 12 divisors (see below), whose sum is σ = 3224399320296. Its totient is φ = 907298509520.

The previous prime is 1828555458157. The next prime is 1828555458179. The reversal of 1828555458172 is 2718545558281.

It is a happy number.

It is a super-2 number, since 2×1828555458172² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1828555458172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1828555458179) 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, 1744804303 + ... + 1744805350.

It is an arithmetic number, because the mean of its divisors is an integer number (268699943358).

Almost surely, 2^{1828555458172} is an apocalyptic number.

It is an amenable number.

1828555458172 is a deficient number, since it is larger than the sum of its proper divisors (1395843862124).

1828555458172 is a wasteful number, since it uses less digits than its factorization.

1828555458172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3489609788 (or 3489609786 counting only the distinct ones).

The product of its digits is 35840000, while the sum is 61.

The spelling of 1828555458172 in words is "one trillion, eight hundred twenty-eight billion, five hundred fifty-five million, four hundred fifty-eight thousand, one hundred seventy-two".