81490611053 has 8 divisors (see below), whose sum is σ = 82492337088. Its totient is φ = 80489359264.

The previous prime is 81490611031. The next prime is 81490611061. The reversal of 81490611053 is 35011609418.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81490611053 - 2¹⁰ = 81490610029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81490610998 and 81490611016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81490611353) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 233600 + ... + 466422.

It is an arithmetic number, because the mean of its divisors is an integer number (10311542136).

Almost surely, 2^81490611053 is an apocalyptic number.

81490611053 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

It is an amenable number.

81490611053 is a deficient number, since it is larger than the sum of its proper divisors (1001726035).

81490611053 is a wasteful number, since it uses less digits than its factorization.

81490611053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237123.

The product of its (nonzero) digits is 25920, while the sum is 38.

The spelling of 81490611053 in words is "eighty-one billion, four hundred ninety million, six hundred eleven thousand, fifty-three".