15451240545 has 48 divisors (see below), whose sum is σ = 28883771280. Its totient is φ = 7595831808.

The previous prime is 15451240529. The next prime is 15451240669. The reversal of 15451240545 is 54504215451.

15451240545 is a `hidden beast` number, since 1 + 54 + 512 + 40 + 54 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 123810129 + 15327430416 = 11127^2 + 123804^2 .

It is not a de Polignac number, because 15451240545 - 2⁴ = 15451240529 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 396139 + ... + 433391.

It is an arithmetic number, because the mean of its divisors is an integer number (601745235).

Almost surely, 2^15451240545 is an apocalyptic number.

15451240545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15451240545 is a deficient number, since it is larger than the sum of its proper divisors (13432530735).

15451240545 is a wasteful number, since it uses less digits than its factorization.

15451240545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37986 (or 37983 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

Adding to 15451240545 its reverse (54504215451), we get a palindrome (69955455996).

It can be divided in two parts, 154512405 and 45, that multiplied together give a square (6953058225 = 83385²).

The spelling of 15451240545 in words is "fifteen billion, four hundred fifty-one million, two hundred forty thousand, five hundred forty-five".