81738594262 has 8 divisors (see below), whose sum is σ = 132039267696. Its totient is φ = 37725505032.

The previous prime is 81738594241. The next prime is 81738594271. The reversal of 81738594262 is 26249583718.

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

It is a super-3 number, since 3×81738594262³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1571896018 + ... + 1571896069.

It is an arithmetic number, because the mean of its divisors is an integer number (16504908462).

Almost surely, 2^81738594262 is an apocalyptic number.

81738594262 is a deficient number, since it is larger than the sum of its proper divisors (50300673434).

81738594262 is a wasteful number, since it uses less digits than its factorization.

81738594262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143792102.

The product of its digits is 5806080, while the sum is 55.

The spelling of 81738594262 in words is "eighty-one billion, seven hundred thirty-eight million, five hundred ninety-four thousand, two hundred sixty-two".