78441572467 has 4 divisors (see below), whose sum is σ = 78486168640. Its totient is φ = 78396976296.

The previous prime is 78441572441. The next prime is 78441572471. The reversal of 78441572467 is 76427514487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76427514487 = 6217 ⋅12293311.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78441572467 is a prime.

It is a super-2 number, since 2×78441572467² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78441552467) by changing a digit.

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, 22295448 + ... + 22298965.

It is an arithmetic number, because the mean of its divisors is an integer number (19621542160).

Almost surely, 2^78441572467 is an apocalyptic number.

78441572467 is a deficient number, since it is larger than the sum of its proper divisors (44596173).

78441572467 is a wasteful number, since it uses less digits than its factorization.

78441572467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44596172.

The product of its digits is 10536960, while the sum is 55.

The spelling of 78441572467 in words is "seventy-eight billion, four hundred forty-one million, five hundred seventy-two thousand, four hundred sixty-seven".