81370434002 has 32 divisors (see below), whose sum is σ = 144242622720. Its totient is φ = 34141420560.

The previous prime is 81370433953. The next prime is 81370434017. The reversal of 81370434002 is 20043407318.

It is a super-2 number, since 2×81370434002² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81370434002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 793418 + ... + 890085.

It is an arithmetic number, because the mean of its divisors is an integer number (4507581960).

Almost surely, 2^81370434002 is an apocalyptic number.

81370434002 is a deficient number, since it is larger than the sum of its proper divisors (62872188718).

81370434002 is a wasteful number, since it uses less digits than its factorization.

81370434002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683555 (or 1683529 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The spelling of 81370434002 in words is "eighty-one billion, three hundred seventy million, four hundred thirty-four thousand, two".