125444152399 has 4 divisors (see below), whose sum is σ = 125503076160. Its totient is φ = 125385228640.

The previous prime is 125444152369. The next prime is 125444152423. The reversal of 125444152399 is 993251444521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993251444521 = 7 ⋅141893063503.

It is a cyclic number.

It is not a de Polignac number, because 125444152399 - 2³¹ = 123296668751 is a prime.

It is a super-2 number, since 2×125444152399² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125444152349) 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, 29458687 + ... + 29462944.

It is an arithmetic number, because the mean of its divisors is an integer number (31375769040).

Almost surely, 2^125444152399 is an apocalyptic number.

125444152399 is a deficient number, since it is larger than the sum of its proper divisors (58923761).

125444152399 is an equidigital number, since it uses as much as digits as its factorization.

125444152399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58923760.

The product of its digits is 1555200, while the sum is 49.

The spelling of 125444152399 in words is "one hundred twenty-five billion, four hundred forty-four million, one hundred fifty-two thousand, three hundred ninety-nine".