125554404023 has 4 divisors (see below), whose sum is σ = 128474273928. Its totient is φ = 122634534120.

The previous prime is 125554403993. The next prime is 125554404083. The reversal of 125554404023 is 320404455521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320404455521 = 17 ⋅18847320913.

It is a cyclic number.

It is not a de Polignac number, because 125554404023 - 2²⁶ = 125487295159 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 (125554404083) 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, 1459934888 + ... + 1459934973.

It is an arithmetic number, because the mean of its divisors is an integer number (32118568482).

Almost surely, 2^125554404023 is an apocalyptic number.

125554404023 is a deficient number, since it is larger than the sum of its proper divisors (2919869905).

125554404023 is an equidigital number, since it uses as much as digits as its factorization.

125554404023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2919869904.

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 125554404023 its reverse (320404455521), we get a palindrome (445958859544).

The spelling of 125554404023 in words is "one hundred twenty-five billion, five hundred fifty-four million, four hundred four thousand, twenty-three".