126858653573 has 4 divisors (see below), whose sum is σ = 128114679948. Its totient is φ = 125602627200.

The previous prime is 126858653567. The next prime is 126858653591. The reversal of 126858653573 is 375356858621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 375356858621 = 17 ⋅22079815213.

It can be written as a sum of positive squares in 2 ways, for example, as 58022210884 + 68836442689 = 240878^2 + 262367^2 .

It is a cyclic number.

It is not a de Polignac number, because 126858653573 - 2²² = 126854459269 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 (126858653533) 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, 628013036 + ... + 628013237.

It is an arithmetic number, because the mean of its divisors is an integer number (32028669987).

Almost surely, 2^126858653573 is an apocalyptic number.

It is an amenable number.

126858653573 is a deficient number, since it is larger than the sum of its proper divisors (1256026375).

126858653573 is a wasteful number, since it uses less digits than its factorization.

126858653573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256026374.

The product of its digits is 36288000, while the sum is 59.

The spelling of 126858653573 in words is "one hundred twenty-six billion, eight hundred fifty-eight million, six hundred fifty-three thousand, five hundred seventy-three".