78369455671 has 4 divisors (see below), whose sum is σ = 84397875352. Its totient is φ = 72341035992.

The previous prime is 78369455663. The next prime is 78369455687. The reversal of 78369455671 is 17655496387.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78369455671 - 2³ = 78369455663 is a prime.

It is a super-2 number, since 2×78369455671² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78369435671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3014209821 + ... + 3014209846.

It is an arithmetic number, because the mean of its divisors is an integer number (21099468838).

Almost surely, 2^78369455671 is an apocalyptic number.

78369455671 is a deficient number, since it is larger than the sum of its proper divisors (6028419681).

78369455671 is a wasteful number, since it uses less digits than its factorization.

78369455671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6028419680.

The product of its digits is 38102400, while the sum is 61.

The spelling of 78369455671 in words is "seventy-eight billion, three hundred sixty-nine million, four hundred fifty-five thousand, six hundred seventy-one".