9845961615 has 128 divisors (see below), whose sum is σ = 21092106240. Its totient is φ = 4262544000.

The previous prime is 9845961613. The next prime is 9845961641. The reversal of 9845961615 is 5161695489.

9845961615 is a `hidden beast` number, since 9 + 8 + 4 + 5 + 9 + 616 + 15 = 666.

It is not a de Polignac number, because 9845961615 - 2¹ = 9845961613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9845961613) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1373290 + ... + 1380440.

It is an arithmetic number, because the mean of its divisors is an integer number (164782080).

Almost surely, 2^9845961615 is an apocalyptic number.

9845961615 is an abundant number, since it is smaller than the sum of its proper divisors (11246144625).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9845961615 is a wasteful number, since it uses less digits than its factorization.

9845961615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7250 (or 7244 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 54.

The square root of 9845961615 is about 99226.8190309455. The cubic root of 9845961615 is about 2143.3152108455.

The spelling of 9845961615 in words is "nine billion, eight hundred forty-five million, nine hundred sixty-one thousand, six hundred fifteen".