125144837864 has 32 divisors (see below), whose sum is σ = 235994358600. Its totient is φ = 62213160960.

The previous prime is 125144837863. The next prime is 125144837891. The reversal of 125144837864 is 468738441521.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 74497335364 + 50647502500 = 272942^2 + 225050^2 .

It is a super-2 number, since 2×125144837864² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125144837863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11487332 + ... + 11498220.

Almost surely, 2^125144837864 is an apocalyptic number.

It is an amenable number.

125144837864 is a deficient number, since it is larger than the sum of its proper divisors (110849520736).

125144837864 is a wasteful number, since it uses less digits than its factorization.

125144837864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19013 (or 19009 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 53.

The spelling of 125144837864 in words is "one hundred twenty-five billion, one hundred forty-four million, eight hundred thirty-seven thousand, eight hundred sixty-four".