125454552520 has 64 divisors (see below), whose sum is σ = 326047680000. Its totient is φ = 42936314880.

The previous prime is 125454552491. The next prime is 125454552523. The reversal of 125454552520 is 25255454521.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (125454552523) 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 15 ways as a sum of consecutive naturals, for example, 8378520 + ... + 8393479.

It is an arithmetic number, because the mean of its divisors is an integer number (5094495000).

Almost surely, 2^125454552520 is an apocalyptic number.

125454552520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125454552520 is an abundant number, since it is smaller than the sum of its proper divisors (200593127480).

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

125454552520 is a wasteful number, since it uses less digits than its factorization.

125454552520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16772038 (or 16772034 counting only the distinct ones).

The product of its (nonzero) digits is 400000, while the sum is 40.

The spelling of 125454552520 in words is "one hundred twenty-five billion, four hundred fifty-four million, five hundred fifty-two thousand, five hundred twenty".