15609623109 has 8 divisors (see below), whose sum is σ = 21908243040. Its totient is φ = 9858709296.

The previous prime is 15609623101. The next prime is 15609623149. The reversal of 15609623109 is 90132690651.

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

It is not a de Polignac number, because 15609623109 - 2³ = 15609623101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15609623101) 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, 136926462 + ... + 136926575.

It is an arithmetic number, because the mean of its divisors is an integer number (2738530380).

Almost surely, 2^15609623109 is an apocalyptic number.

15609623109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

15609623109 is a deficient number, since it is larger than the sum of its proper divisors (6298619931).

15609623109 is a wasteful number, since it uses less digits than its factorization.

15609623109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273853059.

The product of its (nonzero) digits is 87480, while the sum is 42.

The spelling of 15609623109 in words is "fifteen billion, six hundred nine million, six hundred twenty-three thousand, one hundred nine".