125521450555 has 4 divisors (see below), whose sum is σ = 150625740672. Its totient is φ = 100417160440.

The previous prime is 125521450547. The next prime is 125521450573. The reversal of 125521450555 is 555054125521.

It is a happy number.

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

It is not a de Polignac number, because 125521450555 - 2³ = 125521450547 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12552145051 + ... + 12552145060.

It is an arithmetic number, because the mean of its divisors is an integer number (37656435168).

Almost surely, 2^125521450555 is an apocalyptic number.

125521450555 is a deficient number, since it is larger than the sum of its proper divisors (25104290117).

125521450555 is an equidigital number, since it uses as much as digits as its factorization.

125521450555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25104290116.

The product of its (nonzero) digits is 250000, while the sum is 40.

The spelling of 125521450555 in words is "one hundred twenty-five billion, five hundred twenty-one million, four hundred fifty thousand, five hundred fifty-five".