78180754550555 has 32 divisors (see below), whose sum is σ = 95424575281728. Its totient is φ = 61482007756800.

The previous prime is 78180754550551. The next prime is 78180754550557. The reversal of 78180754550555 is 55505545708187.

It is not a de Polignac number, because 78180754550555 - 2² = 78180754550551 is a prime.

It is a super-2 number, since 2×78180754550555² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78180754550491 and 78180754550500.

It is not an unprimeable number, because it can be changed into a prime (78180754550551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127843115 + ... + 128453195.

It is an arithmetic number, because the mean of its divisors is an integer number (2982017977554).

Almost surely, 2^{78180754550555} is an apocalyptic number.

78180754550555 is a deficient number, since it is larger than the sum of its proper divisors (17243820731173).

78180754550555 is a wasteful number, since it uses less digits than its factorization.

78180754550555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611967.

The product of its (nonzero) digits is 196000000, while the sum is 65.

The spelling of 78180754550555 in words is "seventy-eight trillion, one hundred eighty billion, seven hundred fifty-four million, five hundred fifty thousand, five hundred fifty-five".