1957351712543 has 4 divisors (see below), whose sum is σ = 1972763930880. Its totient is φ = 1941939494208.

The previous prime is 1957351712497. The next prime is 1957351712557. The reversal of 1957351712543 is 3452171537591.

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

It is a cyclic number.

It is not a de Polignac number, because 1957351712543 - 2³² = 1953056745247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1957351712443) 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, 7706108978 + ... + 7706109231.

It is an arithmetic number, because the mean of its divisors is an integer number (493190982720).

Almost surely, 2^{1957351712543} is an apocalyptic number.

1957351712543 is a deficient number, since it is larger than the sum of its proper divisors (15412218337).

1957351712543 is a wasteful number, since it uses less digits than its factorization.

1957351712543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15412218336.

The product of its digits is 3969000, while the sum is 53.

The spelling of 1957351712543 in words is "one trillion, nine hundred fifty-seven billion, three hundred fifty-one million, seven hundred twelve thousand, five hundred forty-three".