15900923149 has 4 divisors (see below), whose sum is σ = 15910969536. Its totient is φ = 15890876764.

The previous prime is 15900923147. The next prime is 15900923153. The reversal of 15900923149 is 94132900951.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94132900951 = 1451 ⋅64874501.

It is a cyclic number.

It is not a de Polignac number, because 15900923149 - 2¹ = 15900923147 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 (15900923141) 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, 5020819 + ... + 5023984.

It is an arithmetic number, because the mean of its divisors is an integer number (3977742384).

Almost surely, 2^15900923149 is an apocalyptic number.

It is an amenable number.

15900923149 is a deficient number, since it is larger than the sum of its proper divisors (10046387).

15900923149 is a wasteful number, since it uses less digits than its factorization.

15900923149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10046386.

The product of its (nonzero) digits is 87480, while the sum is 43.

The spelling of 15900923149 in words is "fifteen billion, nine hundred million, nine hundred twenty-three thousand, one hundred forty-nine".