1838813492898 has 54 divisors (see below), whose sum is σ = 4079452854321. Its totient is φ = 598602918816.

The previous prime is 1838813492881. The next prime is 1838813492947. The reversal of 1838813492898 is 8982943188381.

1838813492898 is a `hidden beast` number, since 1 + 8 + 38 + 8 + 13 + 492 + 8 + 98 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1354819177089 + 483994315809 = 1163967^2 + 695697^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=958857.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 247381390 + ... + 247388822.

Almost surely, 2^{1838813492898} is an apocalyptic number.

1838813492898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1838813492898 is an abundant number, since it is smaller than the sum of its proper divisors (2240639361423).

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

1838813492898 is an frugal number, since it uses more digits than its factorization.

1838813492898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14960 (or 7481 counting only the distinct ones).

The product of its digits is 191102976, while the sum is 72.

Multiplying 1838813492898 by its sum of digits (72), we get a square (132394571488656 = 11506284²).

The spelling of 1838813492898 in words is "one trillion, eight hundred thirty-eight billion, eight hundred thirteen million, four hundred ninety-two thousand, eight hundred ninety-eight".