125250254245551 has 4 divisors (see below), whose sum is σ = 167000338994072. Its totient is φ = 83500169497032.

The previous prime is 125250254245499. The next prime is 125250254245553. The reversal of 125250254245551 is 155542452052521.

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

It is not a de Polignac number, because 125250254245551 - 2¹⁰ = 125250254244527 is a prime.

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 125250254245551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125250254245553) 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, 20875042374256 + ... + 20875042374261.

It is an arithmetic number, because the mean of its divisors is an integer number (41750084748518).

Almost surely, 2^{125250254245551} is an apocalyptic number.

125250254245551 is a deficient number, since it is larger than the sum of its proper divisors (41750084748521).

125250254245551 is an equidigital number, since it uses as much as digits as its factorization.

125250254245551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41750084748520.

The product of its (nonzero) digits is 4000000, while the sum is 48.

The spelling of 125250254245551 in words is "one hundred twenty-five trillion, two hundred fifty billion, two hundred fifty-four million, two hundred forty-five thousand, five hundred fifty-one".