61955457 has 4 divisors (see below), whose sum is σ = 82607280. Its totient is φ = 41303636.

The previous prime is 61955441. The next prime is 61955459. The reversal of 61955457 is 75455916.

61955457 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 a cyclic number.

It is not a de Polignac number, because 61955457 - 2⁴ = 61955441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61955459) 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, 10325907 + ... + 10325912.

It is an arithmetic number, because the mean of its divisors is an integer number (20651820).

Almost surely, 2^61955457 is an apocalyptic number.

It is an amenable number.

61955457 is a deficient number, since it is larger than the sum of its proper divisors (20651823).

61955457 is a wasteful number, since it uses less digits than its factorization.

61955457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20651822.

The product of its digits is 189000, while the sum is 42.

The square root of 61955457 is about 7871.1788824801. The cubic root of 61955457 is about 395.6943552680.

The spelling of 61955457 in words is "sixty-one million, nine hundred fifty-five thousand, four hundred fifty-seven".