78455145 has 16 divisors (see below), whose sum is σ = 125963712. Its totient is φ = 41697600.

The previous prime is 78455131. The next prime is 78455147. The reversal of 78455145 is 54155487.

It is not a de Polignac number, because 78455145 - 2⁶ = 78455081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78455147) 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, 4531 + ... + 13320.

It is an arithmetic number, because the mean of its divisors is an integer number (7872732).

Almost surely, 2^78455145 is an apocalyptic number.

It is an amenable number.

78455145 is a deficient number, since it is larger than the sum of its proper divisors (47508567).

78455145 is a wasteful number, since it uses less digits than its factorization.

78455145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18152.

The product of its digits is 112000, while the sum is 39.

The square root of 78455145 is about 8857.4908975398. The cubic root of 78455145 is about 428.0953164281.

The spelling of 78455145 in words is "seventy-eight million, four hundred fifty-five thousand, one hundred forty-five".