61238564 has 6 divisors (see below), whose sum is σ = 107167494. Its totient is φ = 30619280.

The previous prime is 61238563. The next prime is 61238587. The reversal of 61238564 is 46583216.

61238564 is digitally balanced in base 2 and base 9, because in such bases 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., 51265600 + 9972964 = 7160^2 + 3158^2 .

61238564 is strictly pandigital in base 9.

It is not an unprimeable number, because it can be changed into a prime (61238563) by changing a digit.

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, 7654817 + ... + 7654824.

It is an arithmetic number, because the mean of its divisors is an integer number (17861249).

Almost surely, 2^61238564 is an apocalyptic number.

It is an amenable number.

61238564 is a deficient number, since it is larger than the sum of its proper divisors (45928930).

61238564 is a wasteful number, since it uses less digits than its factorization.

61238564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15309645 (or 15309643 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 61238564 is about 7825.5072679028. The cubic root of 61238564 is about 394.1622237316.

The spelling of 61238564 in words is "sixty-one million, two hundred thirty-eight thousand, five hundred sixty-four".