81653468151 has 8 divisors (see below), whose sum is σ = 111187701504. Its totient is φ = 53277440120.

The previous prime is 81653468131. The next prime is 81653468159. The reversal of 81653468151 is 15186435618.

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 81653468151 - 2⁶ = 81653468087 is a prime.

It is a super-2 number, since 2×81653468151² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81653468151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81653468159) 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, 289551165 + ... + 289551446.

It is an arithmetic number, because the mean of its divisors is an integer number (13898462688).

Almost surely, 2^81653468151 is an apocalyptic number.

81653468151 is a deficient number, since it is larger than the sum of its proper divisors (29534233353).

81653468151 is a wasteful number, since it uses less digits than its factorization.

81653468151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579102661.

The product of its digits is 691200, while the sum is 48.

The spelling of 81653468151 in words is "eighty-one billion, six hundred fifty-three million, four hundred sixty-eight thousand, one hundred fifty-one".