61055977 has 4 divisors (see below), whose sum is σ = 61074000. Its totient is φ = 61037956.

The previous prime is 61055941. The next prime is 61055989. The reversal of 61055977 is 77955016.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61055977 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61055927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2227 + ... + 11272.

It is an arithmetic number, because the mean of its divisors is an integer number (15268500).

Almost surely, 2^61055977 is an apocalyptic number.

It is an amenable number.

61055977 is a deficient number, since it is larger than the sum of its proper divisors (18023).

61055977 is a wasteful number, since it uses less digits than its factorization.

61055977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18022.

The product of its (nonzero) digits is 66150, while the sum is 40.

The square root of 61055977 is about 7813.8324143790. The cubic root of 61055977 is about 393.7700931377.

The spelling of 61055977 in words is "sixty-one million, fifty-five thousand, nine hundred seventy-seven".