78975645 has 16 divisors (see below), whose sum is σ = 144412800. Its totient is φ = 36103104.

The previous prime is 78975599. The next prime is 78975653. The reversal of 78975645 is 54657987.

It is not a de Polignac number, because 78975645 - 2⁷ = 78975517 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375970 + ... + 376179.

It is an arithmetic number, because the mean of its divisors is an integer number (9025800).

Almost surely, 2^78975645 is an apocalyptic number.

It is an amenable number.

78975645 is a deficient number, since it is larger than the sum of its proper divisors (65437155).

78975645 is a wasteful number, since it uses less digits than its factorization.

78975645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752164.

The product of its digits is 2116800, while the sum is 51.

The square root of 78975645 is about 8886.8242359124. The cubic root of 78975645 is about 429.0399439011.

The spelling of 78975645 in words is "seventy-eight million, nine hundred seventy-five thousand, six hundred forty-five".