49780454257 has 2 divisors, whose sum is σ = 49780454258. Its totient is φ = 49780454256.

The previous prime is 49780454239. The next prime is 49780454279. The reversal of 49780454257 is 75245408794.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40121692416 + 9658761841 = 200304^2 + 98279^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49780454257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 49780454198 and 49780454207.

It is not a weakly prime, because it can be changed into another prime (49786454257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24890227128 + 24890227129.

It is an arithmetic number, because the mean of its divisors is an integer number (24890227129).

Almost surely, 2^49780454257 is an apocalyptic number.

It is an amenable number.

49780454257 is a deficient number, since it is larger than the sum of its proper divisors (1).

49780454257 is an equidigital number, since it uses as much as digits as its factorization.

49780454257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11289600, while the sum is 55.

The spelling of 49780454257 in words is "forty-nine billion, seven hundred eighty million, four hundred fifty-four thousand, two hundred fifty-seven".