1081616136821 has 16 divisors (see below), whose sum is σ = 1207435973568. Its totient is φ = 960380064000.

The previous prime is 1081616136817. The next prime is 1081616136827. The reversal of 1081616136821 is 1286316161801.

It is a cyclic number.

It is not a de Polignac number, because 1081616136821 - 2² = 1081616136817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081616136827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21959021 + ... + 22008221.

It is an arithmetic number, because the mean of its divisors is an integer number (75464748348).

Almost surely, 2^{1081616136821} is an apocalyptic number.

1081616136821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1081616136821 is a deficient number, since it is larger than the sum of its proper divisors (125819836747).

1081616136821 is a wasteful number, since it uses less digits than its factorization.

1081616136821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95732.

The product of its (nonzero) digits is 82944, while the sum is 44.

The spelling of 1081616136821 in words is "one trillion, eighty-one billion, six hundred sixteen million, one hundred thirty-six thousand, eight hundred twenty-one".