126208199453 has 4 divisors (see below), whose sum is σ = 144237942240. Its totient is φ = 108178456668.

The previous prime is 126208199449. The next prime is 126208199479. The reversal of 126208199453 is 354991802621.

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: 354991802621 = 271 ⋅1309932851.

It is a cyclic number.

It is not a de Polignac number, because 126208199453 - 2² = 126208199449 is a prime.

It is a super-3 number, since 3×126208199453³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126208199413) 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, 9014871383 + ... + 9014871396.

It is an arithmetic number, because the mean of its divisors is an integer number (36059485560).

Almost surely, 2^126208199453 is an apocalyptic number.

It is an amenable number.

126208199453 is a deficient number, since it is larger than the sum of its proper divisors (18029742787).

126208199453 is an equidigital number, since it uses as much as digits as its factorization.

126208199453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18029742786.

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 126208199453 in words is "one hundred twenty-six billion, two hundred eight million, one hundred ninety-nine thousand, four hundred fifty-three".