61281956 has 6 divisors (see below), whose sum is σ = 107243430. Its totient is φ = 30640976.

The previous prime is 61281949. The next prime is 61281977. The reversal of 61281956 is 65918216.

61281956 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., 51609856 + 9672100 = 7184^2 + 3110^2 .

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, 7660241 + ... + 7660248.

It is an arithmetic number, because the mean of its divisors is an integer number (17873905).

Almost surely, 2^61281956 is an apocalyptic number.

It is an amenable number.

61281956 is a deficient number, since it is larger than the sum of its proper divisors (45961474).

61281956 is a wasteful number, since it uses less digits than its factorization.

61281956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15320493 (or 15320491 counting only the distinct ones).

The product of its digits is 25920, while the sum is 38.

The square root of 61281956 is about 7828.2792489793. The cubic root of 61281956 is about 394.2552993362.

The spelling of 61281956 in words is "sixty-one million, two hundred eighty-one thousand, nine hundred fifty-six".