125503632420 has 24 divisors (see below), whose sum is σ = 351410170944. Its totient is φ = 33467635296.

The previous prime is 125503632413. The next prime is 125503632451. The reversal of 125503632420 is 24236305521.

It is a happy number.

It is a super-2 number, since 2×125503632420² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1045863544 + ... + 1045863663.

It is an arithmetic number, because the mean of its divisors is an integer number (14642090456).

Almost surely, 2^125503632420 is an apocalyptic number.

125503632420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125503632420 is an abundant number, since it is smaller than the sum of its proper divisors (225906538524).

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

125503632420 is a wasteful number, since it uses less digits than its factorization.

125503632420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091727219 (or 2091727217 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 125503632420 its reverse (24236305521), we get a palindrome (149739937941).

The spelling of 125503632420 in words is "one hundred twenty-five billion, five hundred three million, six hundred thirty-two thousand, four hundred twenty".