78457547245 has 32 divisors (see below), whose sum is σ = 117837524736. Its totient is φ = 48718233600.

The previous prime is 78457547243. The next prime is 78457547249. The reversal of 78457547245 is 54274575487.

It is a happy number.

It is not a de Polignac number, because 78457547245 - 2¹ = 78457547243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78457547245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78457547243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 297526 + ... + 495415.

It is an arithmetic number, because the mean of its divisors is an integer number (3682422648).

Almost surely, 2^78457547245 is an apocalyptic number.

It is an amenable number.

78457547245 is a deficient number, since it is larger than the sum of its proper divisors (39379977491).

78457547245 is a wasteful number, since it uses less digits than its factorization.

78457547245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793221.

The product of its digits is 43904000, while the sum is 58.

The spelling of 78457547245 in words is "seventy-eight billion, four hundred fifty-seven million, five hundred forty-seven thousand, two hundred forty-five".