78820905037 has 16 divisors (see below), whose sum is σ = 91707955200. Its totient is φ = 66343088880.

The previous prime is 78820905019. The next prime is 78820905041. The reversal of 78820905037 is 73050902887.

It is a cyclic number.

It is not a de Polignac number, because 78820905037 - 2¹⁵ = 78820872269 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 (78820905437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275712 + ... + 483382.

It is an arithmetic number, because the mean of its divisors is an integer number (5731747200).

Almost surely, 2^78820905037 is an apocalyptic number.

It is an amenable number.

78820905037 is a deficient number, since it is larger than the sum of its proper divisors (12887050163).

78820905037 is a wasteful number, since it uses less digits than its factorization.

78820905037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208656.

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 78820905037 in words is "seventy-eight billion, eight hundred twenty million, nine hundred five thousand, thirty-seven".