125571663359 has 4 divisors (see below), whose sum is σ = 125753388600. Its totient is φ = 125389938120.

The previous prime is 125571663319. The next prime is 125571663379. The reversal of 125571663359 is 953366175521.

It is a happy number.

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 125571663359 - 2²⁴ = 125554886143 is a prime.

It is a super-3 number, since 3×125571663359³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125571663359.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125571663319) 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, 90861584 + ... + 90862965.

It is an arithmetic number, because the mean of its divisors is an integer number (31438347150).

Almost surely, 2^125571663359 is an apocalyptic number.

125571663359 is a deficient number, since it is larger than the sum of its proper divisors (181725241).

125571663359 is an equidigital number, since it uses as much as digits as its factorization.

125571663359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181725240.

The product of its digits is 5103000, while the sum is 53.

The spelling of 125571663359 in words is "one hundred twenty-five billion, five hundred seventy-one million, six hundred sixty-three thousand, three hundred fifty-nine".