131506577277 has 4 divisors (see below), whose sum is σ = 175342103040. Its totient is φ = 87671051516.

The previous prime is 131506577261. The next prime is 131506577309. The reversal of 131506577277 is 772775605131.

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 131506577277 - 2⁴ = 131506577261 is a prime.

It is a super-2 number, since 2×131506577277² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131506577177) 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, 21917762877 + ... + 21917762882.

It is an arithmetic number, because the mean of its divisors is an integer number (43835525760).

Almost surely, 2^131506577277 is an apocalyptic number.

It is an amenable number.

131506577277 is a deficient number, since it is larger than the sum of its proper divisors (43835525763).

131506577277 is an equidigital number, since it uses as much as digits as its factorization.

131506577277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43835525762.

The product of its (nonzero) digits is 2160900, while the sum is 51.

The spelling of 131506577277 in words is "one hundred thirty-one billion, five hundred six million, five hundred seventy-seven thousand, two hundred seventy-seven".