81708150107 has 24 divisors (see below), whose sum is σ = 91568251440. Its totient is φ = 72692674560.

The previous prime is 81708150103. The next prime is 81708150109. The reversal of 81708150107 is 70105180718.

It is not a de Polignac number, because 81708150107 - 2² = 81708150103 is a prime.

It is a super-2 number, since 2×81708150107² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81708150103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2493107 + ... + 2525667.

It is an arithmetic number, because the mean of its divisors is an integer number (3815343810).

Almost surely, 2^81708150107 is an apocalyptic number.

81708150107 is a deficient number, since it is larger than the sum of its proper divisors (9860101333).

81708150107 is a wasteful number, since it uses less digits than its factorization.

81708150107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33071 (or 33054 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 38.

The spelling of 81708150107 in words is "eighty-one billion, seven hundred eight million, one hundred fifty thousand, one hundred seven".