81301662 has 24 divisors (see below), whose sum is σ = 189704424. Its totient is φ = 25015824.

The previous prime is 81301651. The next prime is 81301663. The reversal of 81301662 is 26610318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81301663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173488 + ... + 173955.

It is an arithmetic number, because the mean of its divisors is an integer number (7904351).

Almost surely, 2^81301662 is an apocalyptic number.

81301662 is an abundant number, since it is smaller than the sum of its proper divisors (108402762).

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

81301662 is a wasteful number, since it uses less digits than its factorization.

81301662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347464 (or 347461 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 81301662 is about 9016.7434254281. The cubic root of 81301662 is about 433.2113314664.

The spelling of 81301662 in words is "eighty-one million, three hundred one thousand, six hundred sixty-two".