15609313545 has 32 divisors (see below), whose sum is σ = 28809520128. Its totient is φ = 7068992448.

The previous prime is 15609313541. The next prime is 15609313567. The reversal of 15609313545 is 54531390651.

It is not a de Polignac number, because 15609313545 - 2² = 15609313541 is a prime.

It is a super-2 number, since 2×15609313545² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15609313497 and 15609313506.

It is not an unprimeable number, because it can be changed into a prime (15609313541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 683439 + ... + 705908.

It is an arithmetic number, because the mean of its divisors is an integer number (900297504).

Almost surely, 2^15609313545 is an apocalyptic number.

15609313545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15609313545 is a deficient number, since it is larger than the sum of its proper divisors (13200206583).

15609313545 is a wasteful number, since it uses less digits than its factorization.

15609313545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389469.

The product of its (nonzero) digits is 243000, while the sum is 42.

The spelling of 15609313545 in words is "fifteen billion, six hundred nine million, three hundred thirteen thousand, five hundred forty-five".