61655457 has 4 divisors (see below), whose sum is σ = 82207280. Its totient is φ = 41103636.

The previous prime is 61655453. The next prime is 61655467. The reversal of 61655457 is 75455616.

61655457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 61655457 - 2² = 61655453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61655453) 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 3 ways as a sum of consecutive naturals, for example, 10275907 + ... + 10275912.

It is an arithmetic number, because the mean of its divisors is an integer number (20551820).

Almost surely, 2^61655457 is an apocalyptic number.

It is an amenable number.

61655457 is a deficient number, since it is larger than the sum of its proper divisors (20551823).

61655457 is a wasteful number, since it uses less digits than its factorization.

61655457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20551822.

The product of its digits is 126000, while the sum is 39.

The square root of 61655457 is about 7852.0988913793. The cubic root of 61655457 is about 395.0546460742.

The spelling of 61655457 in words is "sixty-one million, six hundred fifty-five thousand, four hundred fifty-seven".