61449957 has 18 divisors (see below), whose sum is σ = 89652498. Its totient is φ = 40558752.

The previous prime is 61449953. The next prime is 61449977. The reversal of 61449957 is 75994416.

It can be written as a sum of positive squares in 3 ways, for example, as 36 + 61449921 = 6^2 + 7839^2 .

It is not a de Polignac number, because 61449957 - 2² = 61449953 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61449953) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 221703 + ... + 221979.

Almost surely, 2^61449957 is an apocalyptic number.

It is an amenable number.

61449957 is a deficient number, since it is larger than the sum of its proper divisors (28202541).

61449957 is a wasteful number, since it uses less digits than its factorization.

61449957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597 (or 437 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 61449957 is about 7839.0022962109. The cubic root of 61449957 is about 394.6152467776.

The spelling of 61449957 in words is "sixty-one million, four hundred forty-nine thousand, nine hundred fifty-seven".