125261651377 has 2 divisors, whose sum is σ = 125261651378. Its totient is φ = 125261651376.

The previous prime is 125261651353. The next prime is 125261651387. The reversal of 125261651377 is 773156162521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81581069376 + 43680582001 = 285624^2 + 208999^2 .

It is a cyclic number.

It is not a de Polignac number, because 125261651377 - 2¹¹ = 125261649329 is a prime.

It is a super-2 number, since 2×125261651377² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125261651387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62630825688 + 62630825689.

It is an arithmetic number, because the mean of its divisors is an integer number (62630825689).

Almost surely, 2^125261651377 is an apocalyptic number.

It is an amenable number.

125261651377 is a deficient number, since it is larger than the sum of its proper divisors (1).

125261651377 is an equidigital number, since it uses as much as digits as its factorization.

125261651377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 46.

The spelling of 125261651377 in words is "one hundred twenty-five billion, two hundred sixty-one million, six hundred fifty-one thousand, three hundred seventy-seven".