78011054893 has 4 divisors (see below), whose sum is σ = 80119461820. Its totient is φ = 75902647968.

The previous prime is 78011054887. The next prime is 78011054903. The reversal of 78011054893 is 39845011087.

It is a happy number.

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 47566737604 + 30444317289 = 218098^2 + 174483^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78011054893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78011004893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1054203408 + ... + 1054203481.

It is an arithmetic number, because the mean of its divisors is an integer number (20029865455).

Almost surely, 2^78011054893 is an apocalyptic number.

It is an amenable number.

78011054893 is a deficient number, since it is larger than the sum of its proper divisors (2108406927).

78011054893 is a wasteful number, since it uses less digits than its factorization.

78011054893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108406926.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 78011054893 in words is "seventy-eight billion, eleven million, fifty-four thousand, eight hundred ninety-three".