61449663 has 8 divisors (see below), whose sum is σ = 89381376. Its totient is φ = 37242200.

The previous prime is 61449659. The next prime is 61449673. The reversal of 61449663 is 36694416.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61449663 - 2² = 61449659 is a prime.

It is a super-2 number, since 2×61449663² = 7552122165627138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61449673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 931023 + ... + 931088.

It is an arithmetic number, because the mean of its divisors is an integer number (11172672).

Almost surely, 2^61449663 is an apocalyptic number.

61449663 is a deficient number, since it is larger than the sum of its proper divisors (27931713).

61449663 is a wasteful number, since it uses less digits than its factorization.

61449663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862125.

The product of its digits is 93312, while the sum is 39.

The square root of 61449663 is about 7838.9835438021. The cubic root of 61449663 is about 394.6146174467.

The spelling of 61449663 in words is "sixty-one million, four hundred forty-nine thousand, six hundred sixty-three".