131440436474 has 4 divisors (see below), whose sum is σ = 197160654714. Its totient is φ = 65720218236.

The previous prime is 131440436441. The next prime is 131440436527. The reversal of 131440436474 is 474634044131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 474634044131 = 13 ⋅36510311087.

It can be written as a sum of positive squares in only one way, i.e., 129574801225 + 1865635249 = 359965^2 + 43193^2 .

It is a Curzon number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 32860109117 + ... + 32860109120.

Almost surely, 2^131440436474 is an apocalyptic number.

131440436474 is a deficient number, since it is larger than the sum of its proper divisors (65720218240).

131440436474 is an equidigital number, since it uses as much as digits as its factorization.

131440436474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65720218239.

The product of its (nonzero) digits is 387072, while the sum is 41.

The spelling of 131440436474 in words is "one hundred thirty-one billion, four hundred forty million, four hundred thirty-six thousand, four hundred seventy-four".