1101538036818 has 24 divisors (see below), whose sum is σ = 2386907917056. Its totient is φ = 367142088600.

The previous prime is 1101538036817. The next prime is 1101538036861. The reversal of 1101538036818 is 8186308351011.

1101538036818 is a `hidden beast` number, since 1 + 1 + 0 + 1 + 538 + 0 + 36 + 81 + 8 = 666.

It is a super-3 number, since 3×1101538036818³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1101538036817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2922138 + ... + 3277493.

It is an arithmetic number, because the mean of its divisors is an integer number (99454496544).

Almost surely, 2^{1101538036818} is an apocalyptic number.

1101538036818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1101538036818 is an abundant number, since it is smaller than the sum of its proper divisors (1285369880238).

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

1101538036818 is a wasteful number, since it uses less digits than its factorization.

1101538036818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6209510 (or 6209507 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 1101538036818 in words is "one trillion, one hundred one billion, five hundred thirty-eight million, thirty-six thousand, eight hundred eighteen".