125426611603 has 4 divisors (see below), whose sum is σ = 125506655680. Its totient is φ = 125346567528.

The previous prime is 125426611543. The next prime is 125426611627. The reversal of 125426611603 is 306116624521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 306116624521 = 31219 ⋅9805459.

It is a cyclic number.

It is not a de Polignac number, because 125426611603 - 2²¹ = 125424514451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125426611003) 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, 40019688 + ... + 40022821.

It is an arithmetic number, because the mean of its divisors is an integer number (31376663920).

Almost surely, 2^125426611603 is an apocalyptic number.

125426611603 is a deficient number, since it is larger than the sum of its proper divisors (80044077).

125426611603 is an equidigital number, since it uses as much as digits as its factorization.

125426611603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80044076.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 125426611603 in words is "one hundred twenty-five billion, four hundred twenty-six million, six hundred eleven thousand, six hundred three".