57736921040 has 20 divisors (see below), whose sum is σ = 134238341604. Its totient is φ = 23094768384.

The previous prime is 57736921037. The next prime is 57736921049. The reversal of 57736921040 is 4012963775.

It can be written as a sum of positive squares in 2 ways, for example, as 30139737664 + 27597183376 = 173608^2 + 166124^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 57736920982 and 57736921000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57736921049) 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, 360855677 + ... + 360855836.

Almost surely, 2^57736921040 is an apocalyptic number.

It is an amenable number.

57736921040 is an abundant number, since it is smaller than the sum of its proper divisors (76501420564).

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

57736921040 is a wasteful number, since it uses less digits than its factorization.

57736921040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721711526 (or 721711520 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 57736921040 in words is "fifty-seven billion, seven hundred thirty-six million, nine hundred twenty-one thousand, forty".