125571663319 has 2 divisors, whose sum is σ = 125571663320. Its totient is φ = 125571663318.

The previous prime is 125571663317. The next prime is 125571663379. The reversal of 125571663319 is 913366175521.

It is a weak prime.

It is an emirp because it is prime and its reverse (913366175521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125571663319 - 2¹ = 125571663317 is a prime.

It is a super-3 number, since 3×125571663319³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 125571663317, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125571663317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62785831659 + 62785831660.

It is an arithmetic number, because the mean of its divisors is an integer number (62785831660).

Almost surely, 2^125571663319 is an apocalyptic number.

125571663319 is a deficient number, since it is larger than the sum of its proper divisors (1).

125571663319 is an equidigital number, since it uses as much as digits as its factorization.

125571663319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1020600, while the sum is 49.

The spelling of 125571663319 in words is "one hundred twenty-five billion, five hundred seventy-one million, six hundred sixty-three thousand, three hundred nineteen".