1549994434545 has 8 divisors (see below), whose sum is σ = 2479991095296. Its totient is φ = 826663698416.

The previous prime is 1549994434507. The next prime is 1549994434567. The reversal of 1549994434545 is 5454344999451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1549994434545 - 2⁶ = 1549994434481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51666481137 + ... + 51666481166.

It is an arithmetic number, because the mean of its divisors is an integer number (309998886912).

Almost surely, 2^{1549994434545} is an apocalyptic number.

1549994434545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1549994434545 is a deficient number, since it is larger than the sum of its proper divisors (929996660751).

1549994434545 is a wasteful number, since it uses less digits than its factorization.

1549994434545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103332962311.

The product of its digits is 279936000, while the sum is 66.

The spelling of 1549994434545 in words is "one trillion, five hundred forty-nine billion, nine hundred ninety-four million, four hundred thirty-four thousand, five hundred forty-five".