78223432287 has 48 divisors (see below), whose sum is σ = 141097295360. Its totient is φ = 37509721920.

The previous prime is 78223432249. The next prime is 78223432319.

78223432287 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78223432287 - 2⁶ = 78223432223 is a prime.

It is a super-2 number, since 2×78223432287² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78223432207) 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, 1150987 + ... + 1217052.

Almost surely, 2^78223432287 is an apocalyptic number.

78223432287 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

78223432287 is a deficient number, since it is larger than the sum of its proper divisors (62873863073).

78223432287 is a wasteful number, since it uses less digits than its factorization.

78223432287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2368084 (or 2368073 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 48.

The spelling of 78223432287 in words is "seventy-eight billion, two hundred twenty-three million, four hundred thirty-two thousand, two hundred eighty-seven".