7421355636 has 12 divisors (see below), whose sum is σ = 17316496512. Its totient is φ = 2473785208.

The previous prime is 7421355631. The next prime is 7421355647. The reversal of 7421355636 is 6365531247.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7421355631) 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, 309223140 + ... + 309223163.

It is an arithmetic number, because the mean of its divisors is an integer number (1443041376).

Almost surely, 2^7421355636 is an apocalyptic number.

It is an amenable number.

7421355636 is an abundant number, since it is smaller than the sum of its proper divisors (9895140876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7421355636 is a wasteful number, since it uses less digits than its factorization.

7421355636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618446310 (or 618446308 counting only the distinct ones).

The product of its digits is 453600, while the sum is 42.

The square root of 7421355636 is about 86147.2903578517. The cubic root of 7421355636 is about 1950.5679376621.

The spelling of 7421355636 in words is "seven billion, four hundred twenty-one million, three hundred fifty-five thousand, six hundred thirty-six".