78444160553 has 8 divisors (see below), whose sum is σ = 87190079616. Its totient is φ = 69967346800.

The previous prime is 78444160547. The next prime is 78444160559. The reversal of 78444160553 is 35506144487.

It is an interprime number because it is at equal distance from previous prime (78444160547) and next prime (78444160559).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78444160553 - 2⁸ = 78444160297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78444160498 and 78444160507.

It is not an unprimeable number, because it can be changed into a prime (78444160559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67275713 + ... + 67276878.

It is an arithmetic number, because the mean of its divisors is an integer number (10898759952).

Almost surely, 2^78444160553 is an apocalyptic number.

It is an amenable number.

78444160553 is a deficient number, since it is larger than the sum of its proper divisors (8745919063).

78444160553 is a wasteful number, since it uses less digits than its factorization.

78444160553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134552655.

The product of its (nonzero) digits is 1612800, while the sum is 47.

The spelling of 78444160553 in words is "seventy-eight billion, four hundred forty-four million, one hundred sixty thousand, five hundred fifty-three".