61690444 has 6 divisors (see below), whose sum is σ = 107958284. Its totient is φ = 30845220.

The previous prime is 61690379. The next prime is 61690471. The reversal of 61690444 is 44409616.

61690444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 7711302 + ... + 7711309.

Almost surely, 2^61690444 is an apocalyptic number.

It is an amenable number.

61690444 is a deficient number, since it is larger than the sum of its proper divisors (46267840).

61690444 is a wasteful number, since it uses less digits than its factorization.

61690444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15422615 (or 15422613 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 61690444 is about 7854.3264510714. The cubic root of 61690444 is about 395.1293578352.

The spelling of 61690444 in words is "sixty-one million, six hundred ninety thousand, four hundred forty-four".