78362215408 has 20 divisors (see below), whose sum is σ = 152417566080. Its totient is φ = 39028649984.

The previous prime is 78362215403. The next prime is 78362215409. The reversal of 78362215408 is 80451226387.

It is a super-2 number, since 2×78362215408² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78362215403) 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, 9524368 + ... + 9532591.

It is an arithmetic number, because the mean of its divisors is an integer number (7620878304).

Almost surely, 2^78362215408 is an apocalyptic number.

It is an amenable number.

78362215408 is a deficient number, since it is larger than the sum of its proper divisors (74055350672).

78362215408 is a wasteful number, since it uses less digits than its factorization.

78362215408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19057224 (or 19057218 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 78362215408 in words is "seventy-eight billion, three hundred sixty-two million, two hundred fifteen thousand, four hundred eight".