78163038836 has 6 divisors (see below), whose sum is σ = 136785317970. Its totient is φ = 39081519416.

The previous prime is 78163038823. The next prime is 78163038847. The reversal of 78163038836 is 63883036187.

It can be written as a sum of positive squares in only one way, i.e., 41951232400 + 36211806436 = 204820^2 + 190294^2 .

It is a super-2 number, since 2×78163038836² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9770379851 + ... + 9770379858.

It is an arithmetic number, because the mean of its divisors is an integer number (22797552995).

Almost surely, 2^78163038836 is an apocalyptic number.

It is an amenable number.

78163038836 is a deficient number, since it is larger than the sum of its proper divisors (58622279134).

78163038836 is a wasteful number, since it uses less digits than its factorization.

78163038836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19540759713 (or 19540759711 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 78163038836 in words is "seventy-eight billion, one hundred sixty-three million, thirty-eight thousand, eight hundred thirty-six".