125684554590 has 144 divisors (see below), whose sum is σ = 380401573968. Its totient is φ = 28707501312.

The previous prime is 125684554559. The next prime is 125684554607. The reversal of 125684554590 is 95455486521.

125684554590 is a `hidden beast` number, since 1 + 2 + 5 + 6 + 8 + 4 + 5 + 545 + 90 = 666.

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 6707074 + ... + 6725786.

It is an arithmetic number, because the mean of its divisors is an integer number (2641677597).

Almost surely, 2^125684554590 is an apocalyptic number.

125684554590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 125684554590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190200786984).

125684554590 is an abundant number, since it is smaller than the sum of its proper divisors (254717019378).

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

125684554590 is a wasteful number, since it uses less digits than its factorization.

125684554590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20263 (or 20253 counting only the distinct ones).

The product of its (nonzero) digits is 8640000, while the sum is 54.

The spelling of 125684554590 in words is "one hundred twenty-five billion, six hundred eighty-four million, five hundred fifty-four thousand, five hundred ninety".