42144320905913 has 2 divisors, whose sum is σ = 42144320905914. Its totient is φ = 42144320905912.

The previous prime is 42144320905859. The next prime is 42144320905943. The reversal of 42144320905913 is 31950902344124.

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., 42048649467049 + 95671438864 = 6484493^2 + 309308^2 .

It is a cyclic number.

It is not a de Polignac number, because 42144320905913 - 2³⁸ = 41869442998969 is a prime.

It is a super-2 number, since 2×42144320905913² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42144320905943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21072160452956 + 21072160452957.

It is an arithmetic number, because the mean of its divisors is an integer number (21072160452957).

Almost surely, 2^{42144320905913} is an apocalyptic number.

It is an amenable number.

42144320905913 is a deficient number, since it is larger than the sum of its proper divisors (1).

42144320905913 is an equidigital number, since it uses as much as digits as its factorization.

42144320905913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 42144320905913 in words is "forty-two trillion, one hundred forty-four billion, three hundred twenty million, nine hundred five thousand, nine hundred thirteen".