131240065465 has 8 divisors (see below), whose sum is σ = 157615400520. Its totient is φ = 104907171072.

The previous prime is 131240065459. The next prime is 131240065477. The reversal of 131240065465 is 564560042131.

It can be written as a sum of positive squares in 4 ways, for example, as 50872351401 + 80367714064 = 225549^2 + 283492^2 .

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 131240065465 - 2⁷ = 131240065337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10603360 + ... + 10615729.

It is an arithmetic number, because the mean of its divisors is an integer number (19701925065).

Almost surely, 2^131240065465 is an apocalyptic number.

It is an amenable number.

131240065465 is a deficient number, since it is larger than the sum of its proper divisors (26375335055).

131240065465 is a wasteful number, since it uses less digits than its factorization.

131240065465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21220331.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 131240065465 in words is "one hundred thirty-one billion, two hundred forty million, sixty-five thousand, four hundred sixty-five".