80636260778 has 8 divisors (see below), whose sum is σ = 122313429540. Its totient is φ = 39865117600.

The previous prime is 80636260759. The next prime is 80636260807. The reversal of 80636260778 is 87706263608.

It can be written as a sum of positive squares in 2 ways, for example, as 60657286369 + 19978974409 = 246287^2 + 141347^2 .

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

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, 226506173 + ... + 226506528.

Almost surely, 2^80636260778 is an apocalyptic number.

80636260778 is a deficient number, since it is larger than the sum of its proper divisors (41677168762).

80636260778 is a wasteful number, since it uses less digits than its factorization.

80636260778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453012792.

The product of its (nonzero) digits is 4064256, while the sum is 53.

The spelling of 80636260778 in words is "eighty billion, six hundred thirty-six million, two hundred sixty thousand, seven hundred seventy-eight".