125777071831 has 2 divisors, whose sum is σ = 125777071832. Its totient is φ = 125777071830.

The previous prime is 125777071801. The next prime is 125777071867. The reversal of 125777071831 is 138170777521.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125777071831 - 2⁹ = 125777071319 is a prime.

It is a super-2 number, since 2×125777071831² (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 (125777071801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62888535915 + 62888535916.

It is an arithmetic number, because the mean of its divisors is an integer number (62888535916).

Almost surely, 2^125777071831 is an apocalyptic number.

125777071831 is a deficient number, since it is larger than the sum of its proper divisors (1).

125777071831 is an equidigital number, since it uses as much as digits as its factorization.

125777071831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576240, while the sum is 49.

The spelling of 125777071831 in words is "one hundred twenty-five billion, seven hundred seventy-seven million, seventy-one thousand, eight hundred thirty-one".