125808218737 has 2 divisors, whose sum is σ = 125808218738. Its totient is φ = 125808218736.

The previous prime is 125808218687. The next prime is 125808218749. The reversal of 125808218737 is 737812808521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105130929121 + 20677289616 = 324239^2 + 143796^2 .

It is a cyclic number.

It is not a de Polignac number, because 125808218737 - 2¹¹ = 125808216689 is a prime.

It is not a weakly prime, because it can be changed into another prime (125808218777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62904109368 + 62904109369.

It is an arithmetic number, because the mean of its divisors is an integer number (62904109369).

Almost surely, 2^125808218737 is an apocalyptic number.

It is an amenable number.

125808218737 is a deficient number, since it is larger than the sum of its proper divisors (1).

125808218737 is an equidigital number, since it uses as much as digits as its factorization.

125808218737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1505280, while the sum is 52.

The spelling of 125808218737 in words is "one hundred twenty-five billion, eight hundred eight million, two hundred eighteen thousand, seven hundred thirty-seven".