125687491944 has 192 divisors, whose sum is σ = 386518003200. Its totient is φ = 33904281600.

The previous prime is 125687491927. The next prime is 125687491961. The reversal of 125687491944 is 449194786521.

It is an interprime number because it is at equal distance from previous prime (125687491927) and next prime (125687491961).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1452652 + ... + 1536740.

It is an arithmetic number, because the mean of its divisors is an integer number (2013114600).

Almost surely, 2^125687491944 is an apocalyptic number.

125687491944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125687491944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193259001600).

125687491944 is an abundant number, since it is smaller than the sum of its proper divisors (260830511256).

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

125687491944 is a wasteful number, since it uses less digits than its factorization.

125687491944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84184 (or 84173 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 60.

The spelling of 125687491944 in words is "one hundred twenty-five billion, six hundred eighty-seven million, four hundred ninety-one thousand, nine hundred forty-four".