125105566655 has 8 divisors (see below), whose sum is σ = 150151542912. Its totient is φ = 100067878048.

The previous prime is 125105566639. The next prime is 125105566657. The reversal of 125105566655 is 556665501521.

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 not a de Polignac number, because 125105566655 - 2⁴ = 125105566639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125105566657) 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, 2038652 + ... + 2099121.

It is an arithmetic number, because the mean of its divisors is an integer number (18768942864).

Almost surely, 2^125105566655 is an apocalyptic number.

125105566655 is a deficient number, since it is larger than the sum of its proper divisors (25045976257).

125105566655 is an equidigital number, since it uses as much as digits as its factorization.

125105566655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4143825.

The product of its (nonzero) digits is 1350000, while the sum is 47.

The spelling of 125105566655 in words is "one hundred twenty-five billion, one hundred five million, five hundred sixty-six thousand, six hundred fifty-five".