78310241249 has 4 divisors (see below), whose sum is σ = 78381628164. Its totient is φ = 78238854336.

The previous prime is 78310241237. The next prime is 78310241291. The reversal of 78310241249 is 94214201387.

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

It can be written as a sum of positive squares in 2 ways, for example, as 57705648400 + 20604592849 = 240220^2 + 143543^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78310241249 is a prime.

It is a super-2 number, since 2×78310241249² (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 (78310291249) 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, 35691812 + ... + 35694005.

It is an arithmetic number, because the mean of its divisors is an integer number (19595407041).

Almost surely, 2^78310241249 is an apocalyptic number.

It is an amenable number.

78310241249 is a deficient number, since it is larger than the sum of its proper divisors (71386915).

78310241249 is a wasteful number, since it uses less digits than its factorization.

78310241249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71386914.

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 78310241249 in words is "seventy-eight billion, three hundred ten million, two hundred forty-one thousand, two hundred forty-nine".