15712001605 has 4 divisors (see below), whose sum is σ = 18854401932. Its totient is φ = 12569601280.

The previous prime is 15712001603. The next prime is 15712001651. The reversal of 15712001605 is 50610021751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8707315969 + 7004685636 = 93313^2 + 83694^2 .

It is not a de Polignac number, because 15712001605 - 2¹ = 15712001603 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 (15712001603) 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, 1571200156 + ... + 1571200165.

It is an arithmetic number, because the mean of its divisors is an integer number (4713600483).

Almost surely, 2^15712001605 is an apocalyptic number.

It is an amenable number.

15712001605 is a deficient number, since it is larger than the sum of its proper divisors (3142400327).

15712001605 is an equidigital number, since it uses as much as digits as its factorization.

15712001605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142400326.

The product of its (nonzero) digits is 2100, while the sum is 28.

The spelling of 15712001605 in words is "fifteen billion, seven hundred twelve million, one thousand, six hundred five".