125607120077 has 4 divisors (see below), whose sum is σ = 125608901340. Its totient is φ = 125605338816.

The previous prime is 125607120049. The next prime is 125607120161. The reversal of 125607120077 is 770021706521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 770021706521 = 43 ⋅17907481547.

It can be written as a sum of positive squares in 2 ways, for example, as 22199212036 + 103407908041 = 148994^2 + 321571^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125607120077 is a prime.

It is a super-2 number, since 2×125607120077² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125607120077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125607120047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 780302 + ... + 927407.

It is an arithmetic number, because the mean of its divisors is an integer number (31402225335).

Almost surely, 2^125607120077 is an apocalyptic number.

It is an amenable number.

125607120077 is a deficient number, since it is larger than the sum of its proper divisors (1781263).

125607120077 is an equidigital number, since it uses as much as digits as its factorization.

125607120077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781262.

The product of its (nonzero) digits is 41160, while the sum is 38.

Adding to 125607120077 its reverse (770021706521), we get a palindrome (895628826598).

The spelling of 125607120077 in words is "one hundred twenty-five billion, six hundred seven million, one hundred twenty thousand, seventy-seven".