49255009861 has 2 divisors, whose sum is σ = 49255009862. Its totient is φ = 49255009860.

The previous prime is 49255009847. The next prime is 49255009883. The reversal of 49255009861 is 16890055294.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47189307361 + 2065702500 = 217231^2 + 45450^2 .

It is a cyclic number.

It is not a de Polignac number, because 49255009861 - 2¹⁷ = 49254878789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49255009801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24627504930 + 24627504931.

It is an arithmetic number, because the mean of its divisors is an integer number (24627504931).

Almost surely, 2^49255009861 is an apocalyptic number.

It is an amenable number.

49255009861 is a deficient number, since it is larger than the sum of its proper divisors (1).

49255009861 is an equidigital number, since it uses as much as digits as its factorization.

49255009861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 777600, while the sum is 49.

The spelling of 49255009861 in words is "forty-nine billion, two hundred fifty-five million, nine thousand, eight hundred sixty-one".