78540062500 has 189 divisors, whose sum is σ = 184447775757. Its totient is φ = 29258100000.

The previous prime is 78540062423. The next prime is 78540062533. The reversal of 78540062500 is 526004587.

It is a happy number.

The square root of 78540062500 is 280250.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 3 ways, for example, as 68808634596 + 9731427904 = 262314^2 + 98648^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78540062500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 1331187471 + ... + 1331187529.

Almost surely, 2^78540062500 is an apocalyptic number.

78540062500 is the 280250-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78540062500

78540062500 is an abundant number, since it is smaller than the sum of its proper divisors (105907713257).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78540062500 is an frugal number, since it uses more digits than its factorization.

78540062500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The spelling of 78540062500 in words is "seventy-eight billion, five hundred forty million, sixty-two thousand, five hundred".