131440278377 has 8 divisors (see below), whose sum is σ = 139175263656. Its totient is φ = 123705649152.

The previous prime is 131440278373. The next prime is 131440278383. The reversal of 131440278377 is 773872044131.

It can be written as a sum of positive squares in 4 ways, for example, as 31505895001 + 99934383376 = 177499^2 + 316124^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131440278377 - 2² = 131440278373 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131440278371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1227293 + ... + 1330085.

It is an arithmetic number, because the mean of its divisors is an integer number (17396907957).

Almost surely, 2^131440278377 is an apocalyptic number.

131440278377 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

131440278377 is a deficient number, since it is larger than the sum of its proper divisors (7734985279).

131440278377 is a wasteful number, since it uses less digits than its factorization.

131440278377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178027.

The product of its (nonzero) digits is 790272, while the sum is 47.

The spelling of 131440278377 in words is "one hundred thirty-one billion, four hundred forty million, two hundred seventy-eight thousand, three hundred seventy-seven".