125920744993 has 4 divisors (see below), whose sum is σ = 125938784448. Its totient is φ = 125902705540.

The previous prime is 125920744969. The next prime is 125920745011. The reversal of 125920744993 is 399447029521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125920744993 - 2¹⁷ = 125920613921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125920747993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9009253 + ... + 9023218.

It is an arithmetic number, because the mean of its divisors is an integer number (31484696112).

Almost surely, 2^125920744993 is an apocalyptic number.

It is an amenable number.

125920744993 is a deficient number, since it is larger than the sum of its proper divisors (18039455).

125920744993 is an equidigital number, since it uses as much as digits as its factorization.

125920744993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18039454.

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 125920744993 in words is "one hundred twenty-five billion, nine hundred twenty million, seven hundred forty-four thousand, nine hundred ninety-three".