81450802 has 8 divisors (see below), whose sum is σ = 122215212. Its totient is φ = 40712400.

The previous prime is 81450793. The next prime is 81450823. The reversal of 81450802 is 20805418.

It can be written as a sum of positive squares in 2 ways, for example, as 81378441 + 72361 = 9021^2 + 269^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6652 + ... + 14392.

Almost surely, 2^81450802 is an apocalyptic number.

81450802 is a deficient number, since it is larger than the sum of its proper divisors (40764410).

81450802 is a wasteful number, since it uses less digits than its factorization.

81450802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13004.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 81450802 is about 9025.0098060889. The cubic root of 81450802 is about 433.4760643563.

The spelling of 81450802 in words is "eighty-one million, four hundred fifty thousand, eight hundred two".