49071981919 has 2 divisors, whose sum is σ = 49071981920. Its totient is φ = 49071981918.

The previous prime is 49071981911. The next prime is 49071981943. The reversal of 49071981919 is 91918917094.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49071981919 - 2³ = 49071981911 is a prime.

It is a super-2 number, since 2×49071981919² (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 (49071981911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24535990959 + 24535990960.

It is an arithmetic number, because the mean of its divisors is an integer number (24535990960).

Almost surely, 2^49071981919 is an apocalyptic number.

49071981919 is a deficient number, since it is larger than the sum of its proper divisors (1).

49071981919 is an equidigital number, since it uses as much as digits as its factorization.

49071981919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 58.

The spelling of 49071981919 in words is "forty-nine billion, seventy-one million, nine hundred eighty-one thousand, nine hundred nineteen".