260402543021 has 4 divisors (see below), whose sum is σ = 264070184544. Its totient is φ = 256734901500.

The previous prime is 260402542969. The next prime is 260402543039. The reversal of 260402543021 is 120345204062.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260402543021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260402543041) 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, 1833820655 + ... + 1833820796.

It is an arithmetic number, because the mean of its divisors is an integer number (66017546136).

Almost surely, 2^260402543021 is an apocalyptic number.

It is an amenable number.

260402543021 is a deficient number, since it is larger than the sum of its proper divisors (3667641523).

260402543021 is an equidigital number, since it uses as much as digits as its factorization.

260402543021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3667641522.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 260402543021 its reverse (120345204062), we get a palindrome (380747747083).

The spelling of 260402543021 in words is "two hundred sixty billion, four hundred two million, five hundred forty-three thousand, twenty-one".