61556164 has 6 divisors (see below), whose sum is σ = 107723294. Its totient is φ = 30778080.

The previous prime is 61556153. The next prime is 61556191. The reversal of 61556164 is 46165516.

It is a happy number.

61556164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 40322500 + 21233664 = 6350^2 + 4608^2 .

It is a super-2 number, since 2×61556164² = 7578322652789792, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7694517 + ... + 7694524.

Almost surely, 2^61556164 is an apocalyptic number.

It is an amenable number.

61556164 is a deficient number, since it is larger than the sum of its proper divisors (46167130).

61556164 is a wasteful number, since it uses less digits than its factorization.

61556164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15389045 (or 15389043 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

The square root of 61556164 is about 7845.7736393551. The cubic root of 61556164 is about 394.8424602760.

The spelling of 61556164 in words is "sixty-one million, five hundred fifty-six thousand, one hundred sixty-four".