80772865 has 8 divisors (see below), whose sum is σ = 102629160. Its totient is φ = 60817152.

The previous prime is 80772863. The next prime is 80772907. The reversal of 80772865 is 56827708.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 35129329 + 45643536 = 5927^2 + 6756^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80772865 - 2¹ = 80772863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80772863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475050 + ... + 475219.

It is an arithmetic number, because the mean of its divisors is an integer number (12828645).

Almost surely, 2^80772865 is an apocalyptic number.

80772865 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

80772865 is a deficient number, since it is larger than the sum of its proper divisors (21856295).

80772865 is a wasteful number, since it uses less digits than its factorization.

80772865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950291.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 80772865 is about 8987.3725303895. The cubic root of 80772865 is about 432.2700661144.

The spelling of 80772865 in words is "eighty million, seven hundred seventy-two thousand, eight hundred sixty-five".