81404310470 has 32 divisors (see below), whose sum is σ = 167575756608. Its totient is φ = 27890805888.

The previous prime is 81404310451. The next prime is 81404310497. The reversal of 81404310470 is 7401340418.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298469 + ... + 501888.

It is an arithmetic number, because the mean of its divisors is an integer number (5236742394).

Almost surely, 2^81404310470 is an apocalyptic number.

81404310470 is an abundant number, since it is smaller than the sum of its proper divisors (86171446138).

81404310470 is a wasteful number, since it uses less digits than its factorization.

81404310470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801824.

The product of its (nonzero) digits is 10752, while the sum is 32.

Adding to 81404310470 its reverse (7401340418), we get a palindrome (88805650888).

The spelling of 81404310470 in words is "eighty-one billion, four hundred four million, three hundred ten thousand, four hundred seventy".