61328756 has 6 divisors (see below), whose sum is σ = 107325330. Its totient is φ = 30664376.

The previous prime is 61328747. The next prime is 61328759. The reversal of 61328756 is 65782316.

It can be written as a sum of positive squares in only one way, i.e., 39891856 + 21436900 = 6316^2 + 4630^2 .

It is a super-2 number, since 2×61328756² = 7522432625015072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61328759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7666091 + ... + 7666098.

It is an arithmetic number, because the mean of its divisors is an integer number (17887555).

Almost surely, 2^61328756 is an apocalyptic number.

It is an amenable number.

61328756 is a deficient number, since it is larger than the sum of its proper divisors (45996574).

61328756 is a wasteful number, since it uses less digits than its factorization.

61328756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15332193 (or 15332191 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 61328756 is about 7831.2678411608. The cubic root of 61328756 is about 394.3556358477.

The spelling of 61328756 in words is "sixty-one million, three hundred twenty-eight thousand, seven hundred fifty-six".