125405263644 has 24 divisors (see below), whose sum is σ = 302702361360. Its totient is φ = 40360314624.

The previous prime is 125405263603. The next prime is 125405263661. The reversal of 125405263644 is 446362504521.

It is a happy number.

It is a super-2 number, since 2×125405263644² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 125405263596 and 125405263605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180179629 + ... + 180180324.

It is an arithmetic number, because the mean of its divisors is an integer number (12612598390).

Almost surely, 2^125405263644 is an apocalyptic number.

It is an amenable number.

125405263644 is an abundant number, since it is smaller than the sum of its proper divisors (177297097716).

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

125405263644 is a wasteful number, since it uses less digits than its factorization.

125405263644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360359989 (or 360359987 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 42.

The spelling of 125405263644 in words is "one hundred twenty-five billion, four hundred five million, two hundred sixty-three thousand, six hundred forty-four".