78180754550577 has 48 divisors (see below), whose sum is σ = 121532707028160. Its totient is φ = 44574237937152.

The previous prime is 78180754550573. The next prime is 78180754550581. The reversal of 78180754550577 is 77505545708187.

It is an interprime number because it is at equal distance from previous prime (78180754550573) and next prime (78180754550581).

It is not a de Polignac number, because 78180754550577 - 2² = 78180754550573 is a prime.

It is a super-2 number, since 2×78180754550577² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78180754550573) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1718348893 + ... + 1718394389.

It is an arithmetic number, because the mean of its divisors is an integer number (2531931396420).

Almost surely, 2^{78180754550577} is an apocalyptic number.

It is an amenable number.

78180754550577 is a deficient number, since it is larger than the sum of its proper divisors (43351952477583).

78180754550577 is a wasteful number, since it uses less digits than its factorization.

78180754550577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71550 (or 71543 counting only the distinct ones).

The product of its (nonzero) digits is 384160000, while the sum is 69.

The spelling of 78180754550577 in words is "seventy-eight trillion, one hundred eighty billion, seven hundred fifty-four million, five hundred fifty thousand, five hundred seventy-seven".