49945164209 has 2 divisors, whose sum is σ = 49945164210. Its totient is φ = 49945164208.

The previous prime is 49945164193. The next prime is 49945164233. The reversal of 49945164209 is 90246154994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48320832400 + 1624331809 = 219820^2 + 40303^2 .

It is a cyclic number.

It is not a de Polignac number, because 49945164209 - 2⁴ = 49945164193 is a prime.

It is not a weakly prime, because it can be changed into another prime (49945164239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24972582104 + 24972582105.

It is an arithmetic number, because the mean of its divisors is an integer number (24972582105).

Almost surely, 2^49945164209 is an apocalyptic number.

It is an amenable number.

49945164209 is a deficient number, since it is larger than the sum of its proper divisors (1).

49945164209 is an equidigital number, since it uses as much as digits as its factorization.

49945164209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2799360, while the sum is 53.

The spelling of 49945164209 in words is "forty-nine billion, nine hundred forty-five million, one hundred sixty-four thousand, two hundred nine".