81658023002 has 8 divisors (see below), whose sum is σ = 122530929312. Its totient is φ = 40814379900.

The previous prime is 81658023001. The next prime is 81658023043. The reversal of 81658023002 is 20032085618.

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

It is a super-2 number, since 2×81658023002² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81658023001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7308824 + ... + 7319987.

It is an arithmetic number, because the mean of its divisors is an integer number (15316366164).

Almost surely, 2^81658023002 is an apocalyptic number.

81658023002 is a deficient number, since it is larger than the sum of its proper divisors (40872906310).

81658023002 is a wasteful number, since it uses less digits than its factorization.

81658023002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14631604.

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 81658023002 in words is "eighty-one billion, six hundred fifty-eight million, twenty-three thousand, two".