61321164 has 12 divisors (see below), whose sum is σ = 143082744. Its totient is φ = 20440384.

The previous prime is 61321163. The next prime is 61321177. The reversal of 61321164 is 46112316.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (61321163) 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 3 ways as a sum of consecutive naturals, for example, 2555037 + ... + 2555060.

It is an arithmetic number, because the mean of its divisors is an integer number (11923562).

Almost surely, 2^61321164 is an apocalyptic number.

It is an amenable number.

61321164 is an abundant number, since it is smaller than the sum of its proper divisors (81761580).

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

61321164 is a wasteful number, since it uses less digits than its factorization.

61321164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5110104 (or 5110102 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 61321164 is about 7830.7831026022. The cubic root of 61321164 is about 394.3393625053.

The spelling of 61321164 in words is "sixty-one million, three hundred twenty-one thousand, one hundred sixty-four".