7420564553 has 4 divisors (see below), whose sum is σ = 7459013268. Its totient is φ = 7382115840.

The previous prime is 7420564523. The next prime is 7420564577. The reversal of 7420564553 is 3554650247.

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

It can be written as a sum of positive squares in 2 ways, for example, as 497825344 + 6922739209 = 22312^2 + 83203^2 .

It is a cyclic number.

It is not a de Polignac number, because 7420564553 - 2¹² = 7420560457 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 7420564553.

It is not an unprimeable number, because it can be changed into a prime (7420564523) 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, 19224068 + ... + 19224453.

It is an arithmetic number, because the mean of its divisors is an integer number (1864753317).

Almost surely, 2^7420564553 is an apocalyptic number.

It is an amenable number.

7420564553 is a deficient number, since it is larger than the sum of its proper divisors (38448715).

7420564553 is a wasteful number, since it uses less digits than its factorization.

7420564553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38448714.

The product of its (nonzero) digits is 504000, while the sum is 41.

The square root of 7420564553 is about 86142.6987794090. The cubic root of 7420564553 is about 1950.4986279545.

The spelling of 7420564553 in words is "seven billion, four hundred twenty million, five hundred sixty-four thousand, five hundred fifty-three".