7387221592818 has 20 divisors (see below), whose sum is σ = 16552848384270. Its totient is φ = 2462407197552.

The previous prime is 7387221592801. The next prime is 7387221592831. The reversal of 7387221592818 is 8182951227837.

7387221592818 is a `hidden beast` number, since 7 + 3 + 8 + 7 + 2 + 21 + 592 + 8 + 18 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6607280034369 + 779941558449 = 2570463^2 + 883143^2 .

It is a super-2 number, since 2×7387221592818² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 22800066483 + ... + 22800066806.

Almost surely, 2^{7387221592818} is an apocalyptic number.

7387221592818 is an abundant number, since it is smaller than the sum of its proper divisors (9165626791452).

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

7387221592818 is a wasteful number, since it uses less digits than its factorization.

7387221592818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45600133303 (or 45600133294 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 63.

The spelling of 7387221592818 in words is "seven trillion, three hundred eighty-seven billion, two hundred twenty-one million, five hundred ninety-two thousand, eight hundred eighteen".