61802649 has 16 divisors (see below), whose sum is σ = 96379200. Its totient is φ = 39032928.

The previous prime is 61802641. The next prime is 61802651. The reversal of 61802649 is 94620816.

61802649 is a `hidden beast` number, since 6 + 1 + 8 + 0 + 2 + 649 = 666.

61802649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61802649 - 2³ = 61802641 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61802641) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 59724 + ... + 60749.

It is an arithmetic number, because the mean of its divisors is an integer number (6023700).

Almost surely, 2^61802649 is an apocalyptic number.

It is an amenable number.

61802649 is a deficient number, since it is larger than the sum of its proper divisors (34576551).

61802649 is a wasteful number, since it uses less digits than its factorization.

61802649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120501 (or 120495 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 61802649 is about 7861.4660846435. The cubic root of 61802649 is about 395.3687716684.

The spelling of 61802649 in words is "sixty-one million, eight hundred two thousand, six hundred forty-nine".