125062521638 has 4 divisors (see below), whose sum is σ = 187593782460. Its totient is φ = 62531260818.

The previous prime is 125062521637. The next prime is 125062521671. The reversal of 125062521638 is 836125260521.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 125062521595 and 125062521604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125062521631) 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 as a sum of consecutive naturals, namely, 31265630408 + ... + 31265630411.

It is an arithmetic number, because the mean of its divisors is an integer number (46898445615).

Almost surely, 2^125062521638 is an apocalyptic number.

125062521638 is a deficient number, since it is larger than the sum of its proper divisors (62531260822).

125062521638 is an equidigital number, since it uses as much as digits as its factorization.

125062521638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62531260821.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 125062521638 in words is "one hundred twenty-five billion, sixty-two million, five hundred twenty-one thousand, six hundred thirty-eight".