78257734366 has 16 divisors (see below), whose sum is σ = 137010502656. Its totient is φ = 32825432376.

The previous prime is 78257734339. The next prime is 78257734369. The reversal of 78257734366 is 66343775287.

It is a super-2 number, since 2×78257734366² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78257734366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78257734369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59465706 + ... + 59467021.

It is an arithmetic number, because the mean of its divisors is an integer number (8563156416).

Almost surely, 2^78257734366 is an apocalyptic number.

78257734366 is a deficient number, since it is larger than the sum of its proper divisors (58752768290).

78257734366 is a wasteful number, since it uses less digits than its factorization.

78257734366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118932783.

The product of its digits is 35562240, while the sum is 58.

The spelling of 78257734366 in words is "seventy-eight billion, two hundred fifty-seven million, seven hundred thirty-four thousand, three hundred sixty-six".