9949864541 has 2 divisors, whose sum is σ = 9949864542. Its totient is φ = 9949864540.

The previous prime is 9949864523. The next prime is 9949864597. The reversal of 9949864541 is 1454689499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6395200900 + 3554663641 = 79970^2 + 59621^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9949864541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9949864241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4974932270 + 4974932271.

It is an arithmetic number, because the mean of its divisors is an integer number (4974932271).

Almost surely, 2^9949864541 is an apocalyptic number.

It is an amenable number.

9949864541 is a deficient number, since it is larger than the sum of its proper divisors (1).

9949864541 is an equidigital number, since it uses as much as digits as its factorization.

9949864541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11197440, while the sum is 59.

The square root of 9949864541 is about 99749.0077193753. The cubic root of 9949864541 is about 2150.8282038030.

The spelling of 9949864541 in words is "nine billion, nine hundred forty-nine million, eight hundred sixty-four thousand, five hundred forty-one".