78777028711 has 8 divisors (see below), whose sum is σ = 79521306480. Its totient is φ = 78033578112.

The previous prime is 78777028699. The next prime is 78777028793. The reversal of 78777028711 is 11782077787.

It is a happy number.

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 78777028711 - 2⁹ = 78777028199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78772028711) 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, 14581 + ... + 397198.

It is an arithmetic number, because the mean of its divisors is an integer number (9940163310).

Almost surely, 2^78777028711 is an apocalyptic number.

78777028711 is a deficient number, since it is larger than the sum of its proper divisors (744277769).

78777028711 is a wasteful number, since it uses less digits than its factorization.

78777028711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413585.

The product of its (nonzero) digits is 2151296, while the sum is 55.

The spelling of 78777028711 in words is "seventy-eight billion, seven hundred seventy-seven million, twenty-eight thousand, seven hundred eleven".