78538136553472 has 48 divisors (see below), whose sum is σ = 157294106243820. Its totient is φ = 39205007179776.

The previous prime is 78538136553433. The next prime is 78538136553529. The reversal of 78538136553472 is 27435563183587.

It can be written as a sum of positive squares in 2 ways, for example, as 55870482318336 + 22667654235136 = 7474656^2 + 4761056^2 .

It is a super-3 number, since 3×78538136553472³ (a number of 43 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 78538136553398 and 78538136553407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30024103 + ... + 32534950.

Almost surely, 2^{78538136553472} is an apocalyptic number.

It is an amenable number.

78538136553472 is an abundant number, since it is smaller than the sum of its proper divisors (78755969690348).

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

78538136553472 is an equidigital number, since it uses as much as digits as its factorization.

78538136553472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62559688 (or 62559668 counting only the distinct ones).

The product of its digits is 508032000, while the sum is 67.

The spelling of 78538136553472 in words is "seventy-eight trillion, five hundred thirty-eight billion, one hundred thirty-six million, five hundred fifty-three thousand, four hundred seventy-two".