9671816545 has 16 divisors (see below), whose sum is σ = 12291339600. Its totient is φ = 7280861184.

The previous prime is 9671816471. The next prime is 9671816551. The reversal of 9671816545 is 5456181769.

It can be written as a sum of positive squares in 8 ways, for example, as 600397009 + 9071419536 = 24503^2 + 95244^2 .

It is not a de Polignac number, because 9671816545 - 2¹³ = 9671808353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9671816492 and 9671816501.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 634129 + ... + 649201.

It is an arithmetic number, because the mean of its divisors is an integer number (768208725).

Almost surely, 2^9671816545 is an apocalyptic number.

It is an amenable number.

9671816545 is a deficient number, since it is larger than the sum of its proper divisors (2619523055).

9671816545 is a wasteful number, since it uses less digits than its factorization.

9671816545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22644.

The product of its digits is 1814400, while the sum is 52.

The square root of 9671816545 is about 98345.3941219415. The cubic root of 9671816545 is about 2130.6037320398.

The spelling of 9671816545 in words is "nine billion, six hundred seventy-one million, eight hundred sixteen thousand, five hundred forty-five".