125747874565 has 4 divisors (see below), whose sum is σ = 150897449484. Its totient is φ = 100598299648.

The previous prime is 125747874541. The next prime is 125747874569. The reversal of 125747874565 is 565478747521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13829524801 + 111918349764 = 117599^2 + 334542^2 .

It is a cyclic number.

It is not a de Polignac number, because 125747874565 - 2¹³ = 125747866373 is a prime.

It is a super-2 number, since 2×125747874565² (a number of 23 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 (125747874569) 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, 12574787452 + ... + 12574787461.

It is an arithmetic number, because the mean of its divisors is an integer number (37724362371).

Almost surely, 2^125747874565 is an apocalyptic number.

It is an amenable number.

125747874565 is a deficient number, since it is larger than the sum of its proper divisors (25149574919).

125747874565 is an equidigital number, since it uses as much as digits as its factorization.

125747874565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25149574918.

The product of its digits is 65856000, while the sum is 61.

The spelling of 125747874565 in words is "one hundred twenty-five billion, seven hundred forty-seven million, eight hundred seventy-four thousand, five hundred sixty-five".