125687644087 has 2 divisors, whose sum is σ = 125687644088. Its totient is φ = 125687644086.

The previous prime is 125687644057. The next prime is 125687644091. The reversal of 125687644087 is 780446786521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125687644087 - 2²³ = 125679255479 is a prime.

It is a super-2 number, since 2×125687644087² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125687644037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62843822043 + 62843822044.

It is an arithmetic number, because the mean of its divisors is an integer number (62843822044).

Almost surely, 2^125687644087 is an apocalyptic number.

125687644087 is a deficient number, since it is larger than the sum of its proper divisors (1).

125687644087 is an equidigital number, since it uses as much as digits as its factorization.

125687644087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18063360, while the sum is 58.

The spelling of 125687644087 in words is "one hundred twenty-five billion, six hundred eighty-seven million, six hundred forty-four thousand, eighty-seven".