42745115442949 has 2 divisors, whose sum is σ = 42745115442950. Its totient is φ = 42745115442948.

The previous prime is 42745115442919. The next prime is 42745115443057. The reversal of 42745115442949 is 94924451154724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37603754196100 + 5141361246849 = 6132190^2 + 2267457^2 .

It is a cyclic number.

It is not a de Polignac number, because 42745115442949 - 2¹¹ = 42745115440901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42745115442919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21372557721474 + 21372557721475.

It is an arithmetic number, because the mean of its divisors is an integer number (21372557721475).

Almost surely, 2^{42745115442949} is an apocalyptic number.

It is an amenable number.

42745115442949 is a deficient number, since it is larger than the sum of its proper divisors (1).

42745115442949 is an equidigital number, since it uses as much as digits as its factorization.

42745115442949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58060800, while the sum is 61.

The spelling of 42745115442949 in words is "forty-two trillion, seven hundred forty-five billion, one hundred fifteen million, four hundred forty-two thousand, nine hundred forty-nine".