125125632019 has 4 divisors (see below), whose sum is σ = 126110873344. Its totient is φ = 124140390696.

The previous prime is 125125632013. The next prime is 125125632029. The reversal of 125125632019 is 910236521521.

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

It is a cyclic number.

It is not a de Polignac number, because 125125632019 - 2²¹ = 125123534867 is a prime.

It is a super-2 number, since 2×125125632019² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125125632013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 492620472 + ... + 492620725.

It is an arithmetic number, because the mean of its divisors is an integer number (31527718336).

Almost surely, 2^125125632019 is an apocalyptic number.

125125632019 is a deficient number, since it is larger than the sum of its proper divisors (985241325).

125125632019 is an equidigital number, since it uses as much as digits as its factorization.

125125632019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985241324.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 125125632019 in words is "one hundred twenty-five billion, one hundred twenty-five million, six hundred thirty-two thousand, nineteen".