2591343442551 has 4 divisors (see below), whose sum is σ = 3455124590072. Its totient is φ = 1727562295032.

The previous prime is 2591343442549. The next prime is 2591343442607. The reversal of 2591343442551 is 1552443431952.

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

It is not a de Polignac number, because 2591343442551 - 2¹ = 2591343442549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2591343442551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2591343442511) 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, 431890573756 + ... + 431890573761.

It is an arithmetic number, because the mean of its divisors is an integer number (863781147518).

Almost surely, 2^{2591343442551} is an apocalyptic number.

2591343442551 is a deficient number, since it is larger than the sum of its proper divisors (863781147521).

2591343442551 is an equidigital number, since it uses as much as digits as its factorization.

2591343442551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863781147520.

The product of its digits is 2592000, while the sum is 48.

The spelling of 2591343442551 in words is "two trillion, five hundred ninety-one billion, three hundred forty-three million, four hundred forty-two thousand, five hundred fifty-one".