61446491 has 4 divisors (see below), whose sum is σ = 61465800. Its totient is φ = 61427184.

The previous prime is 61446487. The next prime is 61446499. The reversal of 61446491 is 19464416.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 61446491 - 2² = 61446487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61446499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3626 + ... + 11663.

It is an arithmetic number, because the mean of its divisors is an integer number (15366450).

Almost surely, 2^61446491 is an apocalyptic number.

61446491 is a deficient number, since it is larger than the sum of its proper divisors (19309).

61446491 is a wasteful number, since it uses less digits than its factorization.

61446491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19308.

The product of its digits is 20736, while the sum is 35.

The square root of 61446491 is about 7838.7812190416. The cubic root of 61446491 is about 394.6078273954.

The spelling of 61446491 in words is "sixty-one million, four hundred forty-six thousand, four hundred ninety-one".