57220535891 has 8 divisors (see below), whose sum is σ = 58704138240. Its totient is φ = 55743883272.

The previous prime is 57220535873. The next prime is 57220535903. The reversal of 57220535891 is 19853502275.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57220535891 - 2²² = 57216341587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57220535851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1720751 + ... + 1753688.

It is an arithmetic number, because the mean of its divisors is an integer number (7338017280).

Almost surely, 2^57220535891 is an apocalyptic number.

57220535891 is a deficient number, since it is larger than the sum of its proper divisors (1483602349).

57220535891 is a wasteful number, since it uses less digits than its factorization.

57220535891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3474865.

The product of its (nonzero) digits is 756000, while the sum is 47.

The spelling of 57220535891 in words is "fifty-seven billion, two hundred twenty million, five hundred thirty-five thousand, eight hundred ninety-one".