7421438558436 has 72 divisors (see below), whose sum is σ = 20523978417600. Its totient is φ = 2080403252928.

The previous prime is 7421438558399. The next prime is 7421438558459. The reversal of 7421438558436 is 6348558341247.

It is a super-2 number, since 2×7421438558436² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 7421438558436.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119039536 + ... + 119101863.

It is an arithmetic number, because the mean of its divisors is an integer number (285055255800).

Almost surely, 2^{7421438558436} is an apocalyptic number.

It is an amenable number.

7421438558436 is an abundant number, since it is smaller than the sum of its proper divisors (13102539859164).

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

7421438558436 is a wasteful number, since it uses less digits than its factorization.

7421438558436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238141473 (or 238141464 counting only the distinct ones).

The product of its digits is 77414400, while the sum is 60.

The spelling of 7421438558436 in words is "seven trillion, four hundred twenty-one billion, four hundred thirty-eight million, five hundred fifty-eight thousand, four hundred thirty-six".