7421561364205 has 8 divisors (see below), whose sum is σ = 8907450769152. Its totient is φ = 5936197669968.

The previous prime is 7421561364157. The next prime is 7421561364241. The reversal of 7421561364205 is 5024631651247.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7421561364205 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131396617 + ... + 131453086.

It is an arithmetic number, because the mean of its divisors is an integer number (1113431346144).

Almost surely, 2^{7421561364205} is an apocalyptic number.

It is an amenable number.

7421561364205 is a deficient number, since it is larger than the sum of its proper divisors (1485889404947).

7421561364205 is a wasteful number, since it uses less digits than its factorization.

7421561364205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262855355.

The product of its (nonzero) digits is 1209600, while the sum is 46.

The spelling of 7421561364205 in words is "seven trillion, four hundred twenty-one billion, five hundred sixty-one million, three hundred sixty-four thousand, two hundred five".