149522778269 has 2 divisors, whose sum is σ = 149522778270. Its totient is φ = 149522778268.

The previous prime is 149522778263. The next prime is 149522778283. The reversal of 149522778269 is 962877225941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126430024900 + 23092753369 = 355570^2 + 151963^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149522778269 is a prime.

It is a super-2 number, since 2×149522778269² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149522778263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74761389134 + 74761389135.

It is an arithmetic number, because the mean of its divisors is an integer number (74761389135).

Almost surely, 2^149522778269 is an apocalyptic number.

It is an amenable number.

149522778269 is a deficient number, since it is larger than the sum of its proper divisors (1).

149522778269 is an equidigital number, since it uses as much as digits as its factorization.

149522778269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30481920, while the sum is 62.

The spelling of 149522778269 in words is "one hundred forty-nine billion, five hundred twenty-two million, seven hundred seventy-eight thousand, two hundred sixty-nine".