78773828245 has 32 divisors (see below), whose sum is σ = 114778483200. Its totient is φ = 50744123136.

The previous prime is 78773828197. The next prime is 78773828257. The reversal of 78773828245 is 54282837787.

It is a happy number.

It is not a de Polignac number, because 78773828245 - 2¹⁷ = 78773697173 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1011225 + ... + 1086334.

It is an arithmetic number, because the mean of its divisors is an integer number (3586827600).

Almost surely, 2^78773828245 is an apocalyptic number.

It is an amenable number.

78773828245 is a deficient number, since it is larger than the sum of its proper divisors (36004654955).

78773828245 is a wasteful number, since it uses less digits than its factorization.

78773828245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2097637.

The product of its digits is 42147840, while the sum is 61.

The spelling of 78773828245 in words is "seventy-eight billion, seven hundred seventy-three million, eight hundred twenty-eight thousand, two hundred forty-five".