81037650853 has 8 divisors (see below), whose sum is σ = 81756499968. Its totient is φ = 80320063824.

The previous prime is 81037650847. The next prime is 81037650877. The reversal of 81037650853 is 35805673018.

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 81037650853 - 2²¹ = 81035553701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81037650053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186301 + ... + 443602.

It is an arithmetic number, because the mean of its divisors is an integer number (10219562496).

Almost surely, 2^81037650853 is an apocalyptic number.

It is an amenable number.

81037650853 is a deficient number, since it is larger than the sum of its proper divisors (718849115).

81037650853 is a wasteful number, since it uses less digits than its factorization.

81037650853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631043.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 81037650853 in words is "eighty-one billion, thirty-seven million, six hundred fifty thousand, eight hundred fifty-three".