21116500061490 has 64 divisors (see below), whose sum is σ = 57082045881600. Its totient is φ = 5553928778112.

The previous prime is 21116500061483. The next prime is 21116500061491. The reversal of 21116500061490 is 9416000561112.

21116500061490 is a `hidden beast` number, since 2 + 1 + 1 + 1 + 6 + 500 + 0 + 6 + 149 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (21116500061491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 535660150 + ... + 535699569.

It is an arithmetic number, because the mean of its divisors is an integer number (891906966900).

Almost surely, 2^{21116500061490} is an apocalyptic number.

21116500061490 is an abundant number, since it is smaller than the sum of its proper divisors (35965545820110).

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

21116500061490 is a wasteful number, since it uses less digits than its factorization.

21116500061490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071359808 (or 1071359802 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 21116500061490 in words is "twenty-one trillion, one hundred sixteen billion, five hundred million, sixty-one thousand, four hundred ninety".