78366453 has 16 divisors (see below), whose sum is σ = 114240000. Its totient is φ = 47389680.

The previous prime is 78366443. The next prime is 78366461. The reversal of 78366453 is 35466387.

It is a de Polignac number, because none of the positive numbers 2^k-78366453 is a prime.

It is a super-2 number, since 2×78366453² = 12282601911602418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78366443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14088 + ... + 18846.

It is an arithmetic number, because the mean of its divisors is an integer number (7140000).

Almost surely, 2^78366453 is an apocalyptic number.

It is an amenable number.

78366453 is a deficient number, since it is larger than the sum of its proper divisors (35873547).

78366453 is a wasteful number, since it uses less digits than its factorization.

78366453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5272.

The product of its digits is 362880, while the sum is 42.

The square root of 78366453 is about 8852.4828720535. The cubic root of 78366453 is about 427.9339378196.

The spelling of 78366453 in words is "seventy-eight million, three hundred sixty-six thousand, four hundred fifty-three".