49492071781 has 2 divisors, whose sum is σ = 49492071782. Its totient is φ = 49492071780.

The previous prime is 49492071767. The next prime is 49492071791. The reversal of 49492071781 is 18717029494.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49491121156 + 950625 = 222466^2 + 975^2 .

It is a cyclic number.

It is not a de Polignac number, because 49492071781 - 2⁹ = 49492071269 is a prime.

It is a super-2 number, since 2×49492071781² (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 (49492071751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24746035890 + 24746035891.

It is an arithmetic number, because the mean of its divisors is an integer number (24746035891).

Almost surely, 2^49492071781 is an apocalyptic number.

It is an amenable number.

49492071781 is a deficient number, since it is larger than the sum of its proper divisors (1).

49492071781 is an equidigital number, since it uses as much as digits as its factorization.

49492071781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 52.

The spelling of 49492071781 in words is "forty-nine billion, four hundred ninety-two million, seventy-one thousand, seven hundred eighty-one".