125536177767881 has 4 divisors (see below), whose sum is σ = 127409852062992. Its totient is φ = 123662503472772.

The previous prime is 125536177767877. The next prime is 125536177767961. The reversal of 125536177767881 is 188767771635521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125536177767881 - 2² = 125536177767877 is a prime.

It is a super-5 number, since 5×125536177767881⁵ (a number of 72 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125536177767799 and 125536177767808.

It is not an unprimeable number, because it can be changed into a prime (125536177767181) 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, 936837147455 + ... + 936837147588.

It is an arithmetic number, because the mean of its divisors is an integer number (31852463015748).

Almost surely, 2^{125536177767881} is an apocalyptic number.

It is an amenable number.

125536177767881 is a deficient number, since it is larger than the sum of its proper divisors (1873674295111).

125536177767881 is an equidigital number, since it uses as much as digits as its factorization.

125536177767881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873674295110.

The product of its digits is 829785600, while the sum is 74.

The spelling of 125536177767881 in words is "one hundred twenty-five trillion, five hundred thirty-six billion, one hundred seventy-seven million, seven hundred sixty-seven thousand, eight hundred eighty-one".