125205155504 has 160 divisors (see below), whose sum is σ = 294635808768. Its totient is φ = 50761728000.

The previous prime is 125205155501. The next prime is 125205155539. The reversal of 125205155504 is 405551502521.

It is not an unprimeable number, because it can be changed into a prime (125205155501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81779219 + ... + 81780749.

Almost surely, 2^125205155504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125205155504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147317904384).

125205155504 is an abundant number, since it is smaller than the sum of its proper divisors (169430653264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125205155504 is a wasteful number, since it uses less digits than its factorization.

125205155504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2747 (or 2741 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 35.

The spelling of 125205155504 in words is "one hundred twenty-five billion, two hundred five million, one hundred fifty-five thousand, five hundred four".