49149791497 has 2 divisors, whose sum is σ = 49149791498. Its totient is φ = 49149791496.

The previous prime is 49149791479. The next prime is 49149791503. The reversal of 49149791497 is 79419794194.

Together with previous prime (49149791479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49133598921 + 16192576 = 221661^2 + 4024^2 .

It is a cyclic number.

It is not a de Polignac number, because 49149791497 - 2¹⁵ = 49149758729 is a prime.

It is not a weakly prime, because it can be changed into another prime (49149791437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24574895748 + 24574895749.

It is an arithmetic number, because the mean of its divisors is an integer number (24574895749).

Almost surely, 2^49149791497 is an apocalyptic number.

It is an amenable number.

49149791497 is a deficient number, since it is larger than the sum of its proper divisors (1).

49149791497 is an equidigital number, since it uses as much as digits as its factorization.

49149791497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20575296, while the sum is 64.

The spelling of 49149791497 in words is "forty-nine billion, one hundred forty-nine million, seven hundred ninety-one thousand, four hundred ninety-seven".