127591190649 has 24 divisors (see below), whose sum is σ = 198527663880. Its totient is φ = 78496895232.

The previous prime is 127591190621. The next prime is 127591190693. The reversal of 127591190649 is 946091195721.

It is a happy number.

127591190649 is a `hidden beast` number, since 1 + 2 + 7 + 591 + 1 + 9 + 0 + 6 + 49 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 13638249 + 127577552400 = 3693^2 + 357180^2 .

It is not a de Polignac number, because 127591190649 - 2¹³ = 127591182457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 127591190595 and 127591190604.

It is not an unprimeable number, because it can be changed into a prime (127591190149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 306207 + ... + 590715.

It is an arithmetic number, because the mean of its divisors is an integer number (8271985995).

Almost surely, 2^127591190649 is an apocalyptic number.

It is an amenable number.

127591190649 is a deficient number, since it is larger than the sum of its proper divisors (70936473231).

127591190649 is a wasteful number, since it uses less digits than its factorization.

127591190649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288361 (or 288358 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 54.

The spelling of 127591190649 in words is "one hundred twenty-seven billion, five hundred ninety-one million, one hundred ninety thousand, six hundred forty-nine".