78484905556 has 12 divisors (see below), whose sum is σ = 139600201300. Its totient is φ = 38599133760.

The previous prime is 78484905539. The next prime is 78484905559. The reversal of 78484905556 is 65550948487.

It can be written as a sum of positive squares in 2 ways, for example, as 33661240900 + 44823664656 = 183470^2 + 211716^2 .

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a junction number, because it is equal to n+sod(n) for n = 78484905494 and 78484905503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78484905559) 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, 160829481 + ... + 160829968.

Almost surely, 2^78484905556 is an apocalyptic number.

It is an amenable number.

78484905556 is a deficient number, since it is larger than the sum of its proper divisors (61115295744).

78484905556 is a wasteful number, since it uses less digits than its factorization.

78484905556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321659514 (or 321659512 counting only the distinct ones).

The product of its (nonzero) digits is 48384000, while the sum is 61.

The spelling of 78484905556 in words is "seventy-eight billion, four hundred eighty-four million, nine hundred five thousand, five hundred fifty-six".