125919959533 has 2 divisors, whose sum is σ = 125919959534. Its totient is φ = 125919959532.

The previous prime is 125919959489. The next prime is 125919959603. The reversal of 125919959533 is 335959919521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90867882249 + 35052077284 = 301443^2 + 187222^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125919959533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125919959233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62959979766 + 62959979767.

It is an arithmetic number, because the mean of its divisors is an integer number (62959979767).

Almost surely, 2^125919959533 is an apocalyptic number.

It is an amenable number.

125919959533 is a deficient number, since it is larger than the sum of its proper divisors (1).

125919959533 is an equidigital number, since it uses as much as digits as its factorization.

125919959533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14762250, while the sum is 61.

The spelling of 125919959533 in words is "one hundred twenty-five billion, nine hundred nineteen million, nine hundred fifty-nine thousand, five hundred thirty-three".