61649488 has 10 divisors (see below), whose sum is σ = 119445914. Its totient is φ = 30824736.

The previous prime is 61649479. The next prime is 61649501. The reversal of 61649488 is 88494616.

It can be written as a sum of positive squares in only one way, i.e., 60031504 + 1617984 = 7748^2 + 1272^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1926531 + ... + 1926562.

Almost surely, 2^61649488 is an apocalyptic number.

It is an amenable number.

61649488 is a deficient number, since it is larger than the sum of its proper divisors (57796426).

61649488 is a wasteful number, since it uses less digits than its factorization.

61649488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3853101 (or 3853095 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The square root of 61649488 is about 7851.7187927230. The cubic root of 61649488 is about 395.0418969606.

The spelling of 61649488 in words is "sixty-one million, six hundred forty-nine thousand, four hundred eighty-eight".