131865782274 has 96 divisors (see below), whose sum is σ = 317019303360. Its totient is φ = 40488829056.

The previous prime is 131865782273. The next prime is 131865782287. The reversal of 131865782274 is 472287568131.

131865782274 is a `hidden beast` number, since 1 + 318 + 6 + 57 + 8 + 2 + 274 = 666.

It is a super-2 number, since 2×131865782274² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 131865782274.

It is not an unprimeable number, because it can be changed into a prime (131865782273) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1995349 + ... + 2060375.

It is an arithmetic number, because the mean of its divisors is an integer number (3302284410).

Almost surely, 2^131865782274 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131865782274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158509651680).

131865782274 is an abundant number, since it is smaller than the sum of its proper divisors (185153521086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131865782274 is a wasteful number, since it uses less digits than its factorization.

131865782274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65149 (or 65096 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The spelling of 131865782274 in words is "one hundred thirty-one billion, eight hundred sixty-five million, seven hundred eighty-two thousand, two hundred seventy-four".