80718734 has 4 divisors (see below), whose sum is σ = 121078104. Its totient is φ = 40359366.

The previous prime is 80718733. The next prime is 80718749. The reversal of 80718734 is 43781708.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80718733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20179682 + ... + 20179685.

It is an arithmetic number, because the mean of its divisors is an integer number (30269526).

Almost surely, 2^80718734 is an apocalyptic number.

80718734 is a deficient number, since it is larger than the sum of its proper divisors (40359370).

80718734 is a wasteful number, since it uses less digits than its factorization.

80718734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40359369.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 80718734 is about 8984.3605225970. The cubic root of 80718734 is about 432.1734807080.

The spelling of 80718734 in words is "eighty million, seven hundred eighteen thousand, seven hundred thirty-four".