78820361895 has 32 divisors (see below), whose sum is σ = 138167887104. Its totient is φ = 38051897600.

The previous prime is 78820361831. The next prime is 78820361897. The reversal of 78820361895 is 59816302887.

It is a happy number.

It is not a de Polignac number, because 78820361895 - 2⁶ = 78820361831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78820361897) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 986661 + ... + 1063550.

It is an arithmetic number, because the mean of its divisors is an integer number (4317746472).

Almost surely, 2^78820361895 is an apocalyptic number.

78820361895 is a deficient number, since it is larger than the sum of its proper divisors (59347525209).

78820361895 is a wasteful number, since it uses less digits than its factorization.

78820361895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050463.

The product of its (nonzero) digits is 5806080, while the sum is 57.

The spelling of 78820361895 in words is "seventy-eight billion, eight hundred twenty million, three hundred sixty-one thousand, eight hundred ninety-five".