61881458 has 4 divisors (see below), whose sum is σ = 92822190. Its totient is φ = 30940728.

The previous prime is 61881451. The next prime is 61881481. The reversal of 61881458 is 85418816.

61881458 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 44182609 + 17698849 = 6647^2 + 4207^2 .

It is not an unprimeable number, because it can be changed into a prime (61881451) 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, 15470363 + ... + 15470366.

Almost surely, 2^61881458 is an apocalyptic number.

61881458 is a deficient number, since it is larger than the sum of its proper divisors (30940732).

61881458 is a wasteful number, since it uses less digits than its factorization.

61881458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30940731.

The product of its digits is 61440, while the sum is 41.

The square root of 61881458 is about 7866.4768479924. The cubic root of 61881458 is about 395.5367546659.

The spelling of 61881458 in words is "sixty-one million, eight hundred eighty-one thousand, four hundred fifty-eight".