2198618537364 has 18 divisors (see below), whose sum is σ = 5557619080650. Its totient is φ = 732872845776.

The previous prime is 2198618537341. The next prime is 2198618537369. The reversal of 2198618537364 is 4637358168912.

2198618537364 is a `hidden beast` number, since 2 + 1 + 9 + 8 + 61 + 8 + 537 + 36 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1835190414864 + 363428122500 = 1354692^2 + 602850^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×2198618537364² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2198618537369) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30536368539 + ... + 30536368610.

Almost surely, 2^{2198618537364} is an apocalyptic number.

It is an amenable number.

2198618537364 is an abundant number, since it is smaller than the sum of its proper divisors (3359000543286).

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

2198618537364 is a wasteful number, since it uses less digits than its factorization.

2198618537364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61072737159 (or 61072737154 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The spelling of 2198618537364 in words is "two trillion, one hundred ninety-eight billion, six hundred eighteen million, five hundred thirty-seven thousand, three hundred sixty-four".