18116181402280 has 64 divisors (see below), whose sum is σ = 43897724332560. Its totient is φ = 6688926148608.

The previous prime is 18116181402119. The next prime is 18116181402331. The reversal of 18116181402280 is 8220418161181.

It can be written as a sum of positive squares in 8 ways, for example, as 6462546959716 + 11653634442564 = 2542154^2 + 3413742^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30160564 + ... + 30755356.

Almost surely, 2^{18116181402280} is an apocalyptic number.

18116181402280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18116181402280 is an abundant number, since it is smaller than the sum of its proper divisors (25781542930280).

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

18116181402280 is a wasteful number, since it uses less digits than its factorization.

18116181402280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653390 (or 653386 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 43.

The spelling of 18116181402280 in words is "eighteen trillion, one hundred sixteen billion, one hundred eighty-one million, four hundred two thousand, two hundred eighty".