260398242821 has 4 divisors (see below), whose sum is σ = 261545371872. Its totient is φ = 259251113772.

The previous prime is 260398242809. The next prime is 260398242847. The reversal of 260398242821 is 128242893062.

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 not a de Polignac number, because 260398242821 - 2⁶ = 260398242757 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 (260398242121) 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, 573564185 + ... + 573564638.

It is an arithmetic number, because the mean of its divisors is an integer number (65386342968).

Almost surely, 2^260398242821 is an apocalyptic number.

It is an amenable number.

260398242821 is a deficient number, since it is larger than the sum of its proper divisors (1147129051).

260398242821 is a wasteful number, since it uses less digits than its factorization.

260398242821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147129050.

The product of its (nonzero) digits is 663552, while the sum is 47.

The spelling of 260398242821 in words is "two hundred sixty billion, three hundred ninety-eight million, two hundred forty-two thousand, eight hundred twenty-one".