125132637551 has 4 divisors (see below), whose sum is σ = 125574802632. Its totient is φ = 124690472472.

The previous prime is 125132637517. The next prime is 125132637563. The reversal of 125132637551 is 155736231521.

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 125132637551 - 2¹⁰ = 125132636527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125132637499 and 125132637508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125132637571) 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, 221082116 + ... + 221082681.

It is an arithmetic number, because the mean of its divisors is an integer number (31393700658).

Almost surely, 2^125132637551 is an apocalyptic number.

125132637551 is a deficient number, since it is larger than the sum of its proper divisors (442165081).

125132637551 is an equidigital number, since it uses as much as digits as its factorization.

125132637551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442165080.

The product of its digits is 189000, while the sum is 41.

The spelling of 125132637551 in words is "one hundred twenty-five billion, one hundred thirty-two million, six hundred thirty-seven thousand, five hundred fifty-one".