78530774735415 has 32 divisors (see below), whose sum is σ = 132264238222080. Its totient is φ = 39678143003136.

The previous prime is 78530774735353. The next prime is 78530774735417. The reversal of 78530774735415 is 51453747703587.

It is a happy number.

It is not a de Polignac number, because 78530774735415 - 2¹⁵ = 78530774702647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78530774735417) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18492084 + ... + 22338726.

It is an arithmetic number, because the mean of its divisors is an integer number (4133257444440).

Almost surely, 2^{78530774735415} is an apocalyptic number.

78530774735415 is a deficient number, since it is larger than the sum of its proper divisors (53733463486665).

78530774735415 is a wasteful number, since it uses less digits than its factorization.

78530774735415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3918303.

The product of its (nonzero) digits is 345744000, while the sum is 66.

The spelling of 78530774735415 in words is "seventy-eight trillion, five hundred thirty billion, seven hundred seventy-four million, seven hundred thirty-five thousand, four hundred fifteen".