78168477711 has 8 divisors (see below), whose sum is σ = 104974455040. Its totient is φ = 51737409432.

The previous prime is 78168477671. The next prime is 78168477713. The reversal of 78168477711 is 11777486187.

It is a happy number.

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

It is not a de Polignac number, because 78168477711 - 2²¹ = 78166380559 is a prime.

It is a super-2 number, since 2×78168477711² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78168477713) 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, 93726775 + ... + 93727608.

It is an arithmetic number, because the mean of its divisors is an integer number (13121806880).

Almost surely, 2^78168477711 is an apocalyptic number.

78168477711 is a deficient number, since it is larger than the sum of its proper divisors (26805977329).

78168477711 is a wasteful number, since it uses less digits than its factorization.

78168477711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187454525.

The product of its digits is 3687936, while the sum is 57.

The spelling of 78168477711 in words is "seventy-eight billion, one hundred sixty-eight million, four hundred seventy-seven thousand, seven hundred eleven".