81348067474 has 16 divisors (see below), whose sum is σ = 122496402240. Its totient is φ = 40516241040.

The previous prime is 81348067457. The next prime is 81348067481. The reversal of 81348067474 is 47476084318.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 456019 + ... + 608809.

It is an arithmetic number, because the mean of its divisors is an integer number (7656025140).

Almost surely, 2^81348067474 is an apocalyptic number.

81348067474 is a deficient number, since it is larger than the sum of its proper divisors (41148334766).

81348067474 is a wasteful number, since it uses less digits than its factorization.

81348067474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153825.

The product of its (nonzero) digits is 3612672, while the sum is 52.

The spelling of 81348067474 in words is "eighty-one billion, three hundred forty-eight million, sixty-seven thousand, four hundred seventy-four".