81526498934 has 8 divisors (see below), whose sum is σ = 122422819440. Its totient is φ = 40718892456.

The previous prime is 81526498931. The next prime is 81526498957. The reversal of 81526498934 is 43989462518.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81526498931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22176209 + ... + 22179884.

It is an arithmetic number, because the mean of its divisors is an integer number (15302852430).

Almost surely, 2^81526498934 is an apocalyptic number.

81526498934 is a deficient number, since it is larger than the sum of its proper divisors (40896320506).

81526498934 is a wasteful number, since it uses less digits than its factorization.

81526498934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44357014.

The product of its digits is 14929920, while the sum is 59.

The spelling of 81526498934 in words is "eighty-one billion, five hundred twenty-six million, four hundred ninety-eight thousand, nine hundred thirty-four".