125134984905 has 64 divisors (see below), whose sum is σ = 242535679488. Its totient is φ = 53782364160.

The previous prime is 125134984901. The next prime is 125134984921. The reversal of 125134984905 is 509489431521.

It is not a de Polignac number, because 125134984905 - 2² = 125134984901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (125134984901) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1664325 + ... + 1737885.

It is an arithmetic number, because the mean of its divisors is an integer number (3789619992).

Almost surely, 2^125134984905 is an apocalyptic number.

125134984905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125134984905 is a deficient number, since it is larger than the sum of its proper divisors (117400694583).

125134984905 is a wasteful number, since it uses less digits than its factorization.

125134984905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74546.

The product of its (nonzero) digits is 1555200, while the sum is 51.

The spelling of 125134984905 in words is "one hundred twenty-five billion, one hundred thirty-four million, nine hundred eighty-four thousand, nine hundred five".