61396529391 has 8 divisors (see below), whose sum is σ = 90957821360. Its totient is φ = 40931019576.

The previous prime is 61396529371. The next prime is 61396529431. The reversal of 61396529391 is 19392569316.

It is not a de Polignac number, because 61396529391 - 2¹⁹ = 61396005103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61396529351) 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 in 7 ways as a sum of consecutive naturals, for example, 1136972740 + ... + 1136972793.

It is an arithmetic number, because the mean of its divisors is an integer number (11369727670).

Almost surely, 2^61396529391 is an apocalyptic number.

61396529391 is a deficient number, since it is larger than the sum of its proper divisors (29561291969).

61396529391 is a wasteful number, since it uses less digits than its factorization.

61396529391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2273945542 (or 2273945536 counting only the distinct ones).

The product of its digits is 2361960, while the sum is 54.

The spelling of 61396529391 in words is "sixty-one billion, three hundred ninety-six million, five hundred twenty-nine thousand, three hundred ninety-one".