1957168203923 has 4 divisors (see below), whose sum is σ = 1957196085648. Its totient is φ = 1957140322200.

The previous prime is 1957168203857. The next prime is 1957168203959. The reversal of 1957168203923 is 3293028617591.

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 1957168203923 - 2⁸ = 1957168203667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1957168253923) 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, 13835303 + ... + 13976048.

It is an arithmetic number, because the mean of its divisors is an integer number (489299021412).

Almost surely, 2^{1957168203923} is an apocalyptic number.

1957168203923 is a deficient number, since it is larger than the sum of its proper divisors (27881725).

1957168203923 is an equidigital number, since it uses as much as digits as its factorization.

1957168203923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27881724.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 1957168203923 in words is "one trillion, nine hundred fifty-seven billion, one hundred sixty-eight million, two hundred three thousand, nine hundred twenty-three".