45042194261 has 2 divisors, whose sum is σ = 45042194262. Its totient is φ = 45042194260.

The previous prime is 45042194243. The next prime is 45042194287. The reversal of 45042194261 is 16249124054.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41059322161 + 3982872100 = 202631^2 + 63110^2 .

It is a cyclic number.

It is not a de Polignac number, because 45042194261 - 2¹⁰ = 45042193237 is a prime.

It is a super-2 number, since 2×45042194261² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45042194221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22521097130 + 22521097131.

It is an arithmetic number, because the mean of its divisors is an integer number (22521097131).

Almost surely, 2^45042194261 is an apocalyptic number.

It is an amenable number.

45042194261 is a deficient number, since it is larger than the sum of its proper divisors (1).

45042194261 is an equidigital number, since it uses as much as digits as its factorization.

45042194261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 45042194261 in words is "forty-five billion, forty-two million, one hundred ninety-four thousand, two hundred sixty-one".