197837453653 has 4 divisors (see below), whose sum is σ = 226099947040. Its totient is φ = 169574960268.

The previous prime is 197837453651. The next prime is 197837453663. The reversal of 197837453653 is 356354738791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 356354738791 = 11719 ⋅30408289.

It is not a de Polignac number, because 197837453653 - 2¹ = 197837453651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 197837453591 and 197837453600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197837453651) 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, 14131246683 + ... + 14131246696.

It is an arithmetic number, because the mean of its divisors is an integer number (56524986760).

Almost surely, 2^197837453653 is an apocalyptic number.

It is an amenable number.

197837453653 is a deficient number, since it is larger than the sum of its proper divisors (28262493387).

197837453653 is an equidigital number, since it uses as much as digits as its factorization.

197837453653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28262493386.

The product of its digits is 57153600, while the sum is 61.

The spelling of 197837453653 in words is "one hundred ninety-seven billion, eight hundred thirty-seven million, four hundred fifty-three thousand, six hundred fifty-three".