125821830758399 has 4 divisors (see below), whose sum is σ = 125821882469136. Its totient is φ = 125821779047664.

The previous prime is 125821830758381. The next prime is 125821830758401. The reversal of 125821830758399 is 993857038128521.

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 125821830758399 - 2³⁶ = 125753111281663 is a prime.

It is a super-2 number, since 2×125821830758399² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125821830758339) 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, 22015499 + ... + 27135324.

It is an arithmetic number, because the mean of its divisors is an integer number (31455470617284).

Almost surely, 2^{125821830758399} is an apocalyptic number.

125821830758399 is a deficient number, since it is larger than the sum of its proper divisors (51710737).

125821830758399 is an equidigital number, since it uses as much as digits as its factorization.

125821830758399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51710736.

The product of its (nonzero) digits is 261273600, while the sum is 71.

The spelling of 125821830758399 in words is "one hundred twenty-five trillion, eight hundred twenty-one billion, eight hundred thirty million, seven hundred fifty-eight thousand, three hundred ninety-nine".