49742864309 has 2 divisors, whose sum is σ = 49742864310. Its totient is φ = 49742864308.

The previous prime is 49742864293. The next prime is 49742864351. The reversal of 49742864309 is 90346824794.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30519041809 + 19223822500 = 174697^2 + 138650^2 .

It is a cyclic number.

It is not a de Polignac number, because 49742864309 - 2⁴ = 49742864293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49742864389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24871432154 + 24871432155.

It is an arithmetic number, because the mean of its divisors is an integer number (24871432155).

Almost surely, 2^49742864309 is an apocalyptic number.

It is an amenable number.

49742864309 is a deficient number, since it is larger than the sum of its proper divisors (1).

49742864309 is an equidigital number, since it uses as much as digits as its factorization.

49742864309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10450944, while the sum is 56.

The spelling of 49742864309 in words is "forty-nine billion, seven hundred forty-two million, eight hundred sixty-four thousand, three hundred nine".