999999999744061 has 2 divisors, whose sum is σ = 999999999744062. Its totient is φ = 999999999744060.

The previous prime is 999999999743971. The next prime is 999999999744071. The reversal of 999999999744061 is 160447999999999.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 721115510716836 + 278884489027225 = 26853594^2 + 16699835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999999999744061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999999999744071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999999872030 + 499999999872031.

It is an arithmetic number, because the mean of its divisors is an integer number (499999999872031).

Almost surely, 2^{999999999744061} is an apocalyptic number.

It is an amenable number.

999999999744061 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999999744061 is an equidigital number, since it uses as much as digits as its factorization.

999999999744061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 260346568608, while the sum is 103.

The spelling of 999999999744061 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, seven hundred forty-four thousand, sixty-one".