57147447842 has 4 divisors (see below), whose sum is σ = 85721171766. Its totient is φ = 28573723920.

The previous prime is 57147447803. The next prime is 57147447853. The reversal of 57147447842 is 24874474175.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 42564228721 + 14583219121 = 206311^2 + 120761^2 .

It is a super-2 number, since 2×57147447842² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14286861959 + ... + 14286861962.

Almost surely, 2^57147447842 is an apocalyptic number.

57147447842 is a deficient number, since it is larger than the sum of its proper divisors (28573723924).

57147447842 is a wasteful number, since it uses less digits than its factorization.

57147447842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28573723923.

The product of its digits is 7024640, while the sum is 53.

The spelling of 57147447842 in words is "fifty-seven billion, one hundred forty-seven million, four hundred forty-seven thousand, eight hundred forty-two".