78232067249 has 12 divisors (see below), whose sum is σ = 91037299428. Its totient is φ = 67032000000.

The previous prime is 78232067209. The next prime is 78232067261. The reversal of 78232067249 is 94276023287.

It can be written as a sum of positive squares in 2 ways, for example, as 23880139024 + 54351928225 = 154532^2 + 233135^2 .

It is a de Polignac number, because none of the positive numbers 2^k-78232067249 is a prime.

It is a super-2 number, since 2×78232067249² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78232067197 and 78232067206.

It is not an unprimeable number, because it can be changed into a prime (78232067209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147752 + ... + 422249.

It is an arithmetic number, because the mean of its divisors is an integer number (7586441619).

Almost surely, 2^78232067249 is an apocalyptic number.

It is an amenable number.

78232067249 is a deficient number, since it is larger than the sum of its proper divisors (12805232179).

78232067249 is a wasteful number, since it uses less digits than its factorization.

78232067249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572816 (or 572809 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 78232067249 in words is "seventy-eight billion, two hundred thirty-two million, sixty-seven thousand, two hundred forty-nine".