15545040243 has 8 divisors (see below), whose sum is σ = 21232250256. Its totient is φ = 10110595200.

The previous prime is 15545040229. The next prime is 15545040299. The reversal of 15545040243 is 34204054551.

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

It is not a de Polignac number, because 15545040243 - 2⁵ = 15545040211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15545042243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63191098 + ... + 63191343.

It is an arithmetic number, because the mean of its divisors is an integer number (2654031282).

Almost surely, 2^15545040243 is an apocalyptic number.

15545040243 is a deficient number, since it is larger than the sum of its proper divisors (5687210013).

15545040243 is a wasteful number, since it uses less digits than its factorization.

15545040243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126382485.

The product of its (nonzero) digits is 48000, while the sum is 33.

Adding to 15545040243 its reverse (34204054551), we get a palindrome (49749094794).

The spelling of 15545040243 in words is "fifteen billion, five hundred forty-five million, forty thousand, two hundred forty-three".