131623840001 has 4 divisors (see below), whose sum is σ = 134834177604. Its totient is φ = 128413502400.

The previous prime is 131623839989. The next prime is 131623840021. The reversal of 131623840001 is 100048326131.

It is a Cunningham number, because it is equal to 362800²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6342529600 + 125281310401 = 79640^2 + 353951^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131623840001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131623840021) 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, 1605168740 + ... + 1605168821.

It is an arithmetic number, because the mean of its divisors is an integer number (33708544401).

Almost surely, 2^131623840001 is an apocalyptic number.

It is an amenable number.

131623840001 is a deficient number, since it is larger than the sum of its proper divisors (3210337603).

131623840001 is an equidigital number, since it uses as much as digits as its factorization.

131623840001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210337602.

The product of its (nonzero) digits is 3456, while the sum is 29.

The spelling of 131623840001 in words is "one hundred thirty-one billion, six hundred twenty-three million, eight hundred forty thousand, one".