125980633818 has 48 divisors (see below), whose sum is σ = 294633928680. Its totient is φ = 38673718272.

The previous prime is 125980633813. The next prime is 125980633847. The reversal of 125980633818 is 818336089521.

125980633818 is a `hidden beast` number, since 1 + 2 + 598 + 0 + 6 + 3 + 38 + 18 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 104275388889 + 21705244929 = 322917^2 + 147327^2 .

It is a super-2 number, since 2×125980633818² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125980633813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 520363 + ... + 723006.

Almost surely, 2^125980633818 is an apocalyptic number.

125980633818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

125980633818 is an abundant number, since it is smaller than the sum of its proper divisors (168653294862).

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

125980633818 is a wasteful number, since it uses less digits than its factorization.

125980633818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243823 (or 1243820 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 125980633818 in words is "one hundred twenty-five billion, nine hundred eighty million, six hundred thirty-three thousand, eight hundred eighteen".