61650055 has 4 divisors (see below), whose sum is σ = 73980072. Its totient is φ = 49320040.

The previous prime is 61650049. The next prime is 61650067. The reversal of 61650055 is 55005616.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61650055 - 2³ = 61650047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6165001 + ... + 6165010.

It is an arithmetic number, because the mean of its divisors is an integer number (18495018).

Almost surely, 2^61650055 is an apocalyptic number.

61650055 is a deficient number, since it is larger than the sum of its proper divisors (12330017).

61650055 is a wasteful number, since it uses less digits than its factorization.

61650055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12330016.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 61650055 is about 7851.7548993840. The cubic root of 61650055 is about 395.0431080443.

The spelling of 61650055 in words is "sixty-one million, six hundred fifty thousand, fifty-five".