81496650398 has 8 divisors (see below), whose sum is σ = 127559974608. Its totient is φ = 38976658864.

The previous prime is 81496650331. The next prime is 81496650409. The reversal of 81496650398 is 89305669418.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 885833111 + ... + 885833202.

It is an arithmetic number, because the mean of its divisors is an integer number (15944996826).

Almost surely, 2^81496650398 is an apocalyptic number.

81496650398 is a deficient number, since it is larger than the sum of its proper divisors (46063324210).

81496650398 is a wasteful number, since it uses less digits than its factorization.

81496650398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771666338.

The product of its (nonzero) digits is 11197440, while the sum is 59.

The spelling of 81496650398 in words is "eighty-one billion, four hundred ninety-six million, six hundred fifty thousand, three hundred ninety-eight".