125838452947079 has 4 divisors (see below), whose sum is σ = 125854671340320. Its totient is φ = 125822234553840.

The previous prime is 125838452947021. The next prime is 125838452947091. The reversal of 125838452947079 is 970749254838521.

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

It is a cyclic number.

It is not a de Polignac number, because 125838452947079 - 2²⁰ = 125838451898503 is a prime.

It is a super-2 number, since 2×125838452947079² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125838452946997 and 125838452947015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125838452947579) 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, 8109184982 + ... + 8109200499.

It is an arithmetic number, because the mean of its divisors is an integer number (31463667835080).

Almost surely, 2^{125838452947079} is an apocalyptic number.

125838452947079 is a deficient number, since it is larger than the sum of its proper divisors (16218393241).

125838452947079 is an equidigital number, since it uses as much as digits as its factorization.

125838452947079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16218393240.

The product of its (nonzero) digits is 1219276800, while the sum is 74.

The spelling of 125838452947079 in words is "one hundred twenty-five trillion, eight hundred thirty-eight billion, four hundred fifty-two million, nine hundred forty-seven thousand, seventy-nine".