126820623253 has 4 divisors (see below), whose sum is σ = 129913809228. Its totient is φ = 123727437280.

The previous prime is 126820623229. The next prime is 126820623269. The reversal of 126820623253 is 352326028621.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51973512529 + 74847110724 = 227977^2 + 273582^2 .

It is a cyclic number.

It is not a de Polignac number, because 126820623253 - 2¹⁷ = 126820492181 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 (126820623053) 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, 1546592926 + ... + 1546593007.

It is an arithmetic number, because the mean of its divisors is an integer number (32478452307).

Almost surely, 2^126820623253 is an apocalyptic number.

It is an amenable number.

126820623253 is a deficient number, since it is larger than the sum of its proper divisors (3093185975).

126820623253 is an equidigital number, since it uses as much as digits as its factorization.

126820623253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3093185974.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 126820623253 in words is "one hundred twenty-six billion, eight hundred twenty million, six hundred twenty-three thousand, two hundred fifty-three".