9961542413 has 4 divisors (see below), whose sum is σ = 9993573408. Its totient is φ = 9929511420.

The previous prime is 9961542407. The next prime is 9961542421. The reversal of 9961542413 is 3142451699.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9961542413 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 (9961502413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16015031 + ... + 16015652.

It is an arithmetic number, because the mean of its divisors is an integer number (2498393352).

Almost surely, 2^9961542413 is an apocalyptic number.

It is an amenable number.

9961542413 is a deficient number, since it is larger than the sum of its proper divisors (32030995).

9961542413 is a wasteful number, since it uses less digits than its factorization.

9961542413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32030994.

The product of its digits is 233280, while the sum is 44.

The square root of 9961542413 is about 99807.5268354046. The cubic root of 9961542413 is about 2151.6693300431.

The spelling of 9961542413 in words is "nine billion, nine hundred sixty-one million, five hundred forty-two thousand, four hundred thirteen".