61391160 has 96 divisors (see below), whose sum is σ = 205994880. Its totient is φ = 15840000.

The previous prime is 61391159. The next prime is 61391167. The reversal of 61391160 is 6119316.

It is a super-2 number, since 2×61391160² = 7537749052291200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61391167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8410 + ... + 13910.

It is an arithmetic number, because the mean of its divisors is an integer number (2145780).

Almost surely, 2^61391160 is an apocalyptic number.

61391160 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61391160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102997440).

61391160 is an abundant number, since it is smaller than the sum of its proper divisors (144603720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61391160 is a wasteful number, since it uses less digits than its factorization.

61391160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5549 (or 5542 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 61391160 is about 7835.2511127596. The cubic root of 61391160 is about 394.4893470597.

The spelling of 61391160 in words is "sixty-one million, three hundred ninety-one thousand, one hundred sixty".