57143491491 has 8 divisors (see below), whose sum is σ = 76255192080. Its totient is φ = 38063725952.

The previous prime is 57143491459. The next prime is 57143491499. The reversal of 57143491491 is 19419434175.

57143491491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 57143491491 - 2⁵ = 57143491459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57143491491.

It is not an unprimeable number, because it can be changed into a prime (57143491499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7979586 + ... + 7986743.

It is an arithmetic number, because the mean of its divisors is an integer number (9531899010).

Almost surely, 2^57143491491 is an apocalyptic number.

57143491491 is a deficient number, since it is larger than the sum of its proper divisors (19111700589).

57143491491 is a wasteful number, since it uses less digits than its factorization.

57143491491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15967525.

The product of its digits is 544320, while the sum is 48.

The spelling of 57143491491 in words is "fifty-seven billion, one hundred forty-three million, four hundred ninety-one thousand, four hundred ninety-one".