78180626047 has 4 divisors (see below), whose sum is σ = 78678591976. Its totient is φ = 77682660120.

The previous prime is 78180626039. The next prime is 78180626057. The reversal of 78180626047 is 74062608187.

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 78180626047 - 2³ = 78180626039 is a prime.

It is a super-2 number, since 2×78180626047² (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 (78180626057) 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, 248982729 + ... + 248983042.

It is an arithmetic number, because the mean of its divisors is an integer number (19669647994).

Almost surely, 2^78180626047 is an apocalyptic number.

78180626047 is a deficient number, since it is larger than the sum of its proper divisors (497965929).

78180626047 is a wasteful number, since it uses less digits than its factorization.

78180626047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497965928.

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 78180626047 in words is "seventy-eight billion, one hundred eighty million, six hundred twenty-six thousand, forty-seven".