57021466640 has 80 divisors (see below), whose sum is σ = 144167437872. Its totient is φ = 20886700032.

The previous prime is 57021466631. The next prime is 57021466651. The reversal of 57021466640 is 4666412075.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 49505296 + 56971961344 = 7036^2 + 238688^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 516269 + ... + 616908.

Almost surely, 2^57021466640 is an apocalyptic number.

It is an amenable number.

57021466640 is an abundant number, since it is smaller than the sum of its proper divisors (87145971232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57021466640 is a wasteful number, since it uses less digits than its factorization.

57021466640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133244 (or 1133238 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 57021466640 in words is "fifty-seven billion, twenty-one million, four hundred sixty-six thousand, six hundred forty".