125351310781 has 16 divisors (see below), whose sum is σ = 128427859456. Its totient is φ = 122310000000.

The previous prime is 125351310779. The next prime is 125351310803. The reversal of 125351310781 is 187013153521.

It is not a de Polignac number, because 125351310781 - 2¹ = 125351310779 is a prime.

It is a super-2 number, since 2×125351310781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125351310781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125351310761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6908401 + ... + 6926521.

It is an arithmetic number, because the mean of its divisors is an integer number (8026741216).

Almost surely, 2^125351310781 is an apocalyptic number.

It is an amenable number.

125351310781 is a deficient number, since it is larger than the sum of its proper divisors (3076548675).

125351310781 is a wasteful number, since it uses less digits than its factorization.

125351310781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19084.

The product of its (nonzero) digits is 25200, while the sum is 37.

The spelling of 125351310781 in words is "one hundred twenty-five billion, three hundred fifty-one million, three hundred ten thousand, seven hundred eighty-one".