61385191 has 12 divisors (see below), whose sum is σ = 71553240. Its totient is φ = 52508400.

The previous prime is 61385171. The next prime is 61385201. The reversal of 61385191 is 19158316.

It is not a de Polignac number, because 61385191 - 2¹¹ = 61383143 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 (61385131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31341 + ... + 33241.

It is an arithmetic number, because the mean of its divisors is an integer number (5962770).

Almost surely, 2^61385191 is an apocalyptic number.

61385191 is a deficient number, since it is larger than the sum of its proper divisors (10168049).

61385191 is a wasteful number, since it uses less digits than its factorization.

61385191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574 (or 2567 counting only the distinct ones).

The product of its digits is 6480, while the sum is 34.

The square root of 61385191 is about 7834.8701967550. The cubic root of 61385191 is about 394.4765613794.

The spelling of 61385191 in words is "sixty-one million, three hundred eighty-five thousand, one hundred ninety-one".