78354245387 has 24 divisors (see below), whose sum is σ = 87157700448. Its totient is φ = 70380097920.

The previous prime is 78354245381. The next prime is 78354245419.

78354245387 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78354245387 - 2¹² = 78354241291 is a prime.

It is a super-2 number, since 2×78354245387² (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 (78354245381) 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 23 ways as a sum of consecutive naturals, for example, 5688713 + ... + 5702469.

It is an arithmetic number, because the mean of its divisors is an integer number (3631570852).

Almost surely, 2^78354245387 is an apocalyptic number.

78354245387 is a deficient number, since it is larger than the sum of its proper divisors (8803455061).

78354245387 is a wasteful number, since it uses less digits than its factorization.

78354245387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14339 (or 14328 counting only the distinct ones).

The product of its digits is 22579200, while the sum is 56.

The spelling of 78354245387 in words is "seventy-eight billion, three hundred fifty-four million, two hundred forty-five thousand, three hundred eighty-seven".