125344442513 has 2 divisors, whose sum is σ = 125344442514. Its totient is φ = 125344442512.

The previous prime is 125344442507. The next prime is 125344442539. The reversal of 125344442513 is 315244443521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92214254224 + 33130188289 = 303668^2 + 182017^2 .

It is a cyclic number.

It is not a de Polignac number, because 125344442513 - 2³⁴ = 108164573329 is a prime.

It is a super-2 number, since 2×125344442513² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125344442563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62672221256 + 62672221257.

It is an arithmetic number, because the mean of its divisors is an integer number (62672221257).

Almost surely, 2^125344442513 is an apocalyptic number.

It is an amenable number.

125344442513 is a deficient number, since it is larger than the sum of its proper divisors (1).

125344442513 is an equidigital number, since it uses as much as digits as its factorization.

125344442513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 230400, while the sum is 38.

The spelling of 125344442513 in words is "one hundred twenty-five billion, three hundred forty-four million, four hundred forty-two thousand, five hundred thirteen".