61349253291 has 12 divisors (see below), whose sum is σ = 90776944440. Its totient is φ = 39901953120.

The previous prime is 61349253283. The next prime is 61349253323. The reversal of 61349253291 is 19235294316.

61349253291 is a `hidden beast` number, since 613 + 4 + 9 + 2 + 5 + 3 + 29 + 1 = 666.

It is not a de Polignac number, because 61349253291 - 2³ = 61349253283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61349253211) 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 in 11 ways as a sum of consecutive naturals, for example, 83128701 + ... + 83129438.

It is an arithmetic number, because the mean of its divisors is an integer number (7564745370).

Almost surely, 2^61349253291 is an apocalyptic number.

61349253291 is a deficient number, since it is larger than the sum of its proper divisors (29427691149).

61349253291 is a wasteful number, since it uses less digits than its factorization.

61349253291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166258186 (or 166258183 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The spelling of 61349253291 in words is "sixty-one billion, three hundred forty-nine million, two hundred fifty-three thousand, two hundred ninety-one".