81952553170 has 8 divisors (see below), whose sum is σ = 147514595724. Its totient is φ = 32781021264.

The previous prime is 81952553167. The next prime is 81952553171. The reversal of 81952553170 is 7135525918.

It can be written as a sum of positive squares in 2 ways, for example, as 70574704281 + 11377848889 = 265659^2 + 106667^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 81952553170.

It is not an unprimeable number, because it can be changed into a prime (81952553171) 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, 4097627649 + ... + 4097627668.

Almost surely, 2^81952553170 is an apocalyptic number.

81952553170 is a deficient number, since it is larger than the sum of its proper divisors (65562042554).

81952553170 is a wasteful number, since it uses less digits than its factorization.

81952553170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8195255324.

The product of its (nonzero) digits is 378000, while the sum is 46.

The spelling of 81952553170 in words is "eighty-one billion, nine hundred fifty-two million, five hundred fifty-three thousand, one hundred seventy".