15204542345 has 4 divisors (see below), whose sum is σ = 18245450820. Its totient is φ = 12163633872.

The previous prime is 15204542341. The next prime is 15204542351. The reversal of 15204542345 is 54324540251.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4882795129 + 10321747216 = 69877^2 + 101596^2 .

It is a cyclic number.

It is not a de Polignac number, because 15204542345 - 2² = 15204542341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15204542341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1520454230 + ... + 1520454239.

It is an arithmetic number, because the mean of its divisors is an integer number (4561362705).

Almost surely, 2^15204542345 is an apocalyptic number.

It is an amenable number.

15204542345 is a deficient number, since it is larger than the sum of its proper divisors (3040908475).

15204542345 is an equidigital number, since it uses as much as digits as its factorization.

15204542345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3040908474.

The product of its (nonzero) digits is 96000, while the sum is 35.

The spelling of 15204542345 in words is "fifteen billion, two hundred four million, five hundred forty-two thousand, three hundred forty-five".