57780961 has 4 divisors (see below), whose sum is σ = 66035392. Its totient is φ = 49526532.

The previous prime is 57780941. The next prime is 57780967. The reversal of 57780961 is 16908775.

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 57780961 - 2⁵ = 57780929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57780967) 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, 4127205 + ... + 4127218.

It is an arithmetic number, because the mean of its divisors is an integer number (16508848).

Almost surely, 2^57780961 is an apocalyptic number.

It is an amenable number.

57780961 is a deficient number, since it is larger than the sum of its proper divisors (8254431).

57780961 is an equidigital number, since it uses as much as digits as its factorization.

57780961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8254430.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 57780961 is about 7601.3788880702. The cubic root of 57780961 is about 386.5997660547.

The spelling of 57780961 in words is "fifty-seven million, seven hundred eighty thousand, nine hundred sixty-one".