81088737934 has 4 divisors (see below), whose sum is σ = 121633106904. Its totient is φ = 40544368966.

The previous prime is 81088737913. The next prime is 81088737973. The reversal of 81088737934 is 43973788018.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43973788018 = 2 ⋅21986894009.

It is a super-3 number, since 3×81088737934³ (a number of 34 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20272184482 + ... + 20272184485.

It is an arithmetic number, because the mean of its divisors is an integer number (30408276726).

Almost surely, 2^81088737934 is an apocalyptic number.

81088737934 is a deficient number, since it is larger than the sum of its proper divisors (40544368970).

81088737934 is a wasteful number, since it uses less digits than its factorization.

81088737934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40544368969.

The product of its (nonzero) digits is 8128512, while the sum is 58.

The spelling of 81088737934 in words is "eighty-one billion, eighty-eight million, seven hundred thirty-seven thousand, nine hundred thirty-four".