81341504 has 14 divisors (see below), whose sum is σ = 161412174. Its totient is φ = 40670720.

The previous prime is 81341479. The next prime is 81341521. The reversal of 81341504 is 40514318.

It can be written as a sum of positive squares in only one way, i.e., 74787904 + 6553600 = 8648^2 + 2560^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635417 + ... + 635544.

It is an arithmetic number, because the mean of its divisors is an integer number (11529441).

Almost surely, 2^81341504 is an apocalyptic number.

It is an amenable number.

81341504 is a deficient number, since it is larger than the sum of its proper divisors (80070670).

81341504 is a wasteful number, since it uses less digits than its factorization.

81341504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270973 (or 1270963 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 81341504 is about 9018.9524890643. The cubic root of 81341504 is about 433.2820851951.

The spelling of 81341504 in words is "eighty-one million, three hundred forty-one thousand, five hundred four".