80774945 has 4 divisors (see below), whose sum is σ = 96929940. Its totient is φ = 64619952.

The previous prime is 80774891. The next prime is 80774951. The reversal of 80774945 is 54947708.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31550689 + 49224256 = 5617^2 + 7016^2 .

It is a cyclic number.

It is not a de Polignac number, because 80774945 - 2¹⁸ = 80512801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80774896 and 80774905.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8077490 + ... + 8077499.

It is an arithmetic number, because the mean of its divisors is an integer number (24232485).

Almost surely, 2^80774945 is an apocalyptic number.

It is an amenable number.

80774945 is a deficient number, since it is larger than the sum of its proper divisors (16154995).

80774945 is a wasteful number, since it uses less digits than its factorization.

80774945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16154994.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 80774945 is about 8987.4882475584. The cubic root of 80774945 is about 432.2737765768.

The spelling of 80774945 in words is "eighty million, seven hundred seventy-four thousand, nine hundred forty-five".