125978337193 has 2 divisors, whose sum is σ = 125978337194. Its totient is φ = 125978337192.

The previous prime is 125978337119. The next prime is 125978337269. The reversal of 125978337193 is 391733879521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113574392064 + 12403945129 = 337008^2 + 111373^2 .

It is a cyclic number.

It is not a de Polignac number, because 125978337193 - 2²¹ = 125976240041 is a prime.

It is not a weakly prime, because it can be changed into another prime (125978335193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62989168596 + 62989168597.

It is an arithmetic number, because the mean of its divisors is an integer number (62989168597).

Almost surely, 2^125978337193 is an apocalyptic number.

It is an amenable number.

125978337193 is a deficient number, since it is larger than the sum of its proper divisors (1).

125978337193 is an equidigital number, since it uses as much as digits as its factorization.

125978337193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8573040, while the sum is 58.

The spelling of 125978337193 in words is "one hundred twenty-five billion, nine hundred seventy-eight million, three hundred thirty-seven thousand, one hundred ninety-three".