1800007445745 has 80 divisors (see below), whose sum is σ = 3323730400848. Its totient is φ = 931283619840.

The previous prime is 1800007445737. The next prime is 1800007445749. The reversal of 1800007445745 is 5475447000081.

1800007445745 is a `hidden beast` number, since 1 + 8 + 0 + 0 + 0 + 0 + 74 + 4 + 574 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 236537295201 + 1563470150544 = 486351^2 + 1250388^2 .

It is not a de Polignac number, because 1800007445745 - 2³ = 1800007445737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1800007445745.

It is not an unprimeable number, because it can be changed into a prime (1800007445749) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4871725 + ... + 5228165.

Almost surely, 2^{1800007445745} is an apocalyptic number.

1800007445745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1800007445745 is a deficient number, since it is larger than the sum of its proper divisors (1523722955103).

1800007445745 is a wasteful number, since it uses less digits than its factorization.

1800007445745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356832 (or 356823 counting only the distinct ones).

The product of its (nonzero) digits is 627200, while the sum is 45.

The spelling of 1800007445745 in words is "one trillion, eight hundred billion, seven million, four hundred forty-five thousand, seven hundred forty-five".