81952745174 has 8 divisors (see below), whose sum is σ = 123109103880. Its totient is φ = 40916377216.

The previous prime is 81952745137. The next prime is 81952745177. The reversal of 81952745174 is 47154725918.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81952745177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29995979 + ... + 29998710.

It is an arithmetic number, because the mean of its divisors is an integer number (15388637985).

Almost surely, 2^81952745174 is an apocalyptic number.

81952745174 is a deficient number, since it is larger than the sum of its proper divisors (41156358706).

81952745174 is a wasteful number, since it uses less digits than its factorization.

81952745174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59995374.

The product of its digits is 2822400, while the sum is 53.

The spelling of 81952745174 in words is "eighty-one billion, nine hundred fifty-two million, seven hundred forty-five thousand, one hundred seventy-four".