78453415 has 4 divisors (see below), whose sum is σ = 94144104. Its totient is φ = 62762728.

The previous prime is 78453383. The next prime is 78453433. The reversal of 78453415 is 51435487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51435487 = 1093 ⋅47059.

It is a cyclic number.

It is not a de Polignac number, because 78453415 - 2⁵ = 78453383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7845337 + ... + 7845346.

It is an arithmetic number, because the mean of its divisors is an integer number (23536026).

Almost surely, 2^78453415 is an apocalyptic number.

78453415 is a deficient number, since it is larger than the sum of its proper divisors (15690689).

78453415 is a wasteful number, since it uses less digits than its factorization.

78453415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15690688.

The product of its digits is 67200, while the sum is 37.

The square root of 78453415 is about 8857.3932395485. The cubic root of 78453415 is about 428.0921697879.

The spelling of 78453415 in words is "seventy-eight million, four hundred fifty-three thousand, four hundred fifteen".