81069602213 has 8 divisors (see below), whose sum is σ = 81405001440. Its totient is φ = 80734302000.

The previous prime is 81069602197. The next prime is 81069602267. The reversal of 81069602213 is 31220696018.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 81069602213 - 2⁴ = 81069602197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81069002213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1934306 + ... + 1975772.

It is an arithmetic number, because the mean of its divisors is an integer number (10175625180).

Almost surely, 2^81069602213 is an apocalyptic number.

It is an amenable number.

81069602213 is a deficient number, since it is larger than the sum of its proper divisors (335399227).

81069602213 is a wasteful number, since it uses less digits than its factorization.

81069602213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49507.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 81069602213 in words is "eighty-one billion, sixty-nine million, six hundred two thousand, two hundred thirteen".