81370003478 has 32 divisors (see below), whose sum is σ = 130233420000. Its totient is φ = 38019421440.

The previous prime is 81370003457. The next prime is 81370003483. The reversal of 81370003478 is 87430007318.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1395248 + ... + 1452396.

It is an arithmetic number, because the mean of its divisors is an integer number (4069794375).

Almost surely, 2^81370003478 is an apocalyptic number.

81370003478 is a deficient number, since it is larger than the sum of its proper divisors (48863416522).

81370003478 is a wasteful number, since it uses less digits than its factorization.

81370003478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57680.

The product of its (nonzero) digits is 112896, while the sum is 41.

The spelling of 81370003478 in words is "eighty-one billion, three hundred seventy million, three thousand, four hundred seventy-eight".