15718645345 has 8 divisors (see below), whose sum is σ = 20313326376. Its totient is φ = 11607614976.

The previous prime is 15718645333. The next prime is 15718645351. The reversal of 15718645345 is 54354681751.

It can be written as a sum of positive squares in 4 ways, for example, as 1039869009 + 14678776336 = 32247^2 + 121156^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 15718645345 - 2¹³ = 15718637153 is a prime.

It is a super-2 number, since 2×15718645345² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120912592 + ... + 120912721.

It is an arithmetic number, because the mean of its divisors is an integer number (2539165797).

Almost surely, 2^15718645345 is an apocalyptic number.

It is an amenable number.

15718645345 is a deficient number, since it is larger than the sum of its proper divisors (4594681031).

15718645345 is a wasteful number, since it uses less digits than its factorization.

15718645345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241825331.

The product of its digits is 2016000, while the sum is 49.

The spelling of 15718645345 in words is "fifteen billion, seven hundred eighteen million, six hundred forty-five thousand, three hundred forty-five".