125838492551 has 8 divisors (see below), whose sum is σ = 126329856000. Its totient is φ = 125347328280.

The previous prime is 125838492523. The next prime is 125838492581. The reversal of 125838492551 is 155294838521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125838492551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125838492493 and 125838492502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125838492581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1285850 + ... + 1380248.

It is an arithmetic number, because the mean of its divisors is an integer number (15791232000).

Almost surely, 2^125838492551 is an apocalyptic number.

125838492551 is a deficient number, since it is larger than the sum of its proper divisors (491363449).

125838492551 is an equidigital number, since it uses as much as digits as its factorization.

125838492551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99589.

The product of its digits is 3456000, while the sum is 53.

The spelling of 125838492551 in words is "one hundred twenty-five billion, eight hundred thirty-eight million, four hundred ninety-two thousand, five hundred fifty-one".