61320164 has 12 divisors (see below), whose sum is σ = 107711100. Its totient is φ = 30545568.

The previous prime is 61320131. The next prime is 61320167. The reversal of 61320164 is 46102316.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27772900 + 33547264 = 5270^2 + 5792^2 .

It is not an unprimeable number, because it can be changed into a prime (61320167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27419 + ... + 29570.

It is an arithmetic number, because the mean of its divisors is an integer number (8975925).

Almost surely, 2^61320164 is an apocalyptic number.

It is an amenable number.

61320164 is a deficient number, since it is larger than the sum of its proper divisors (46390936).

61320164 is a wasteful number, since it uses less digits than its factorization.

61320164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57262 (or 57260 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 61320164 is about 7830.7192517674. The cubic root of 61320164 is about 394.3372189196.

The spelling of 61320164 in words is "sixty-one million, three hundred twenty thousand, one hundred sixty-four".