81770104 has 16 divisors (see below), whose sum is σ = 165112920. Its totient is φ = 37740000.

The previous prime is 81770081. The next prime is 81770107. The reversal of 81770104 is 40107718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81770107) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 393022 + ... + 393229.

Almost surely, 2^81770104 is an apocalyptic number.

It is an amenable number.

81770104 is an abundant number, since it is smaller than the sum of its proper divisors (83342816).

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

81770104 is a wasteful number, since it uses less digits than its factorization.

81770104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786270 (or 786266 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 81770104 is about 9042.6823454106. The cubic root of 81770104 is about 434.0417608664.

The spelling of 81770104 in words is "eighty-one million, seven hundred seventy thousand, one hundred four".