2643521560431 has 4 divisors (see below), whose sum is σ = 3524695413912. Its totient is φ = 1762347706952.

The previous prime is 2643521560409. The next prime is 2643521560453. The reversal of 2643521560431 is 1340651253462.

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

It is an interprime number because it is at equal distance from previous prime (2643521560409) and next prime (2643521560453).

It is a cyclic number.

It is not a de Polignac number, because 2643521560431 - 2⁵ = 2643521560399 is a prime.

It is a super-2 number, since 2×2643521560431² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643521562431) 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, 440586926736 + ... + 440586926741.

It is an arithmetic number, because the mean of its divisors is an integer number (881173853478).

Almost surely, 2^{2643521560431} is an apocalyptic number.

2643521560431 is a deficient number, since it is larger than the sum of its proper divisors (881173853481).

2643521560431 is an equidigital number, since it uses as much as digits as its factorization.

2643521560431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881173853480.

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 2643521560431 in words is "two trillion, six hundred forty-three billion, five hundred twenty-one million, five hundred sixty thousand, four hundred thirty-one".