61616650 has 24 divisors (see below), whose sum is σ = 116555040. Its totient is φ = 24227760.

The previous prime is 61616641. The next prime is 61616651. The reversal of 61616650 is 5661616.

It is a super-2 number, since 2×61616650² = 7593223114445000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61616651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7494 + ... + 13393.

It is an arithmetic number, because the mean of its divisors is an integer number (4856460).

Almost surely, 2^61616650 is an apocalyptic number.

61616650 is a deficient number, since it is larger than the sum of its proper divisors (54938390).

61616650 is a wasteful number, since it uses less digits than its factorization.

61616650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20958 (or 20953 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 61616650 is about 7849.6273796913. The cubic root of 61616650 is about 394.9717439597.

The spelling of 61616650 in words is "sixty-one million, six hundred sixteen thousand, six hundred fifty".