2043445818015 has 64 divisors (see below), whose sum is σ = 4152040657920. Its totient is φ = 934084172160.

The previous prime is 2043445817999. The next prime is 2043445818041. The reversal of 2043445818015 is 5108185443402.

2043445818015 is a `hidden beast` number, since 2 + 0 + 4 + 3 + 4 + 458 + 180 + 15 = 666.

It is not a de Polignac number, because 2043445818015 - 2⁴ = 2043445817999 is a prime.

It is a super-2 number, since 2×2043445818015² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15935937 + ... + 16063653.

It is an arithmetic number, because the mean of its divisors is an integer number (64875635280).

Almost surely, 2^{2043445818015} is an apocalyptic number.

2043445818015 is an abundant number, since it is smaller than the sum of its proper divisors (2108594839905).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2043445818015 is a wasteful number, since it uses less digits than its factorization.

2043445818015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144669 (or 144663 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The spelling of 2043445818015 in words is "two trillion, forty-three billion, four hundred forty-five million, eight hundred eighteen thousand, fifteen".