81735012 has 36 divisors (see below), whose sum is σ = 207707136. Its totient is φ = 27100080.

The previous prime is 81734999. The next prime is 81735037. The reversal of 81735012 is 21053718.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×81735012² = 13361224373280288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 933 + ... + 12819.

Almost surely, 2^81735012 is an apocalyptic number.

It is an amenable number.

81735012 is an abundant number, since it is smaller than the sum of its proper divisors (125972124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81735012 is a wasteful number, since it uses less digits than its factorization.

81735012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12088 (or 12083 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 81735012 is about 9040.7417837255. The cubic root of 81735012 is about 433.9796616716.

The spelling of 81735012 in words is "eighty-one million, seven hundred thirty-five thousand, twelve".