1657344472243 has 4 divisors (see below), whose sum is σ = 1658939607520. Its totient is φ = 1655749336968.

The previous prime is 1657344472183. The next prime is 1657344472271. The reversal of 1657344472243 is 3422744437561.

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 1657344472243 - 2²⁹ = 1656807601331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1657344472943) 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, 797566080 + ... + 797568157.

It is an arithmetic number, because the mean of its divisors is an integer number (414734901880).

Almost surely, 2^{1657344472243} is an apocalyptic number.

1657344472243 is a deficient number, since it is larger than the sum of its proper divisors (1595135277).

1657344472243 is a wasteful number, since it uses less digits than its factorization.

1657344472243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595135276.

The product of its digits is 13547520, while the sum is 52.

The spelling of 1657344472243 in words is "one trillion, six hundred fifty-seven billion, three hundred forty-four million, four hundred seventy-two thousand, two hundred forty-three".