125778343837 has 16 divisors (see below), whose sum is σ = 128660326704. Its totient is φ = 122938560000.

The previous prime is 125778343793. The next prime is 125778343871. The reversal of 125778343837 is 738343877521.

It can be written as a sum of positive squares in 8 ways, for example, as 5071433796 + 120706910041 = 71214^2 + 347429^2 .

It is a cyclic number.

It is not a de Polignac number, because 125778343837 - 2¹⁵ = 125778311069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125778343877) 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, 2479387 + ... + 2529607.

It is an arithmetic number, because the mean of its divisors is an integer number (8041270419).

Almost surely, 2^125778343837 is an apocalyptic number.

It is an amenable number.

125778343837 is a deficient number, since it is larger than the sum of its proper divisors (2881982867).

125778343837 is a wasteful number, since it uses less digits than its factorization.

125778343837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50640.

The product of its digits is 23708160, while the sum is 58.

The spelling of 125778343837 in words is "one hundred twenty-five billion, seven hundred seventy-eight million, three hundred forty-three thousand, eight hundred thirty-seven".