15000857149 has 4 divisors (see below), whose sum is σ = 15349714336. Its totient is φ = 14651999964.

The previous prime is 15000857111. The next prime is 15000857153. The reversal of 15000857149 is 94175800051.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15000857149 - 2¹¹ = 15000855101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15000854149) 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, 174428529 + ... + 174428614.

It is an arithmetic number, because the mean of its divisors is an integer number (3837428584).

Almost surely, 2^15000857149 is an apocalyptic number.

It is an amenable number.

15000857149 is a deficient number, since it is larger than the sum of its proper divisors (348857187).

15000857149 is an equidigital number, since it uses as much as digits as its factorization.

15000857149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348857186.

The product of its (nonzero) digits is 50400, while the sum is 40.

The spelling of 15000857149 in words is "fifteen billion, eight hundred fifty-seven thousand, one hundred forty-nine".