125773311261 has 32 divisors (see below), whose sum is σ = 185107507200. Its totient is φ = 75472173504.

The previous prime is 125773311247. The next prime is 125773311283. The reversal of 125773311261 is 162113377521.

It is not a de Polignac number, because 125773311261 - 2⁹ = 125773310749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125773311061) 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 in 31 ways as a sum of consecutive naturals, for example, 941920 + ... + 1067126.

It is an arithmetic number, because the mean of its divisors is an integer number (5784609600).

Almost surely, 2^125773311261 is an apocalyptic number.

It is an amenable number.

125773311261 is a deficient number, since it is larger than the sum of its proper divisors (59334195939).

125773311261 is a wasteful number, since it uses less digits than its factorization.

125773311261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125865.

The product of its digits is 52920, while the sum is 39.

Adding to 125773311261 its reverse (162113377521), we get a palindrome (287886688782).

The spelling of 125773311261 in words is "one hundred twenty-five billion, seven hundred seventy-three million, three hundred eleven thousand, two hundred sixty-one".