78075755 has 4 divisors (see below), whose sum is σ = 93690912. Its totient is φ = 62460600.

The previous prime is 78075721. The next prime is 78075761. The reversal of 78075755 is 55757087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55757087 = 47 ⋅1186321.

It is not a de Polignac number, because 78075755 - 2²⁴ = 61298539 is a prime.

It is a Duffinian 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, 7807571 + ... + 7807580.

It is an arithmetic number, because the mean of its divisors is an integer number (23422728).

Almost surely, 2^78075755 is an apocalyptic number.

78075755 is a deficient number, since it is larger than the sum of its proper divisors (15615157).

78075755 is a wasteful number, since it uses less digits than its factorization.

78075755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15615156.

The product of its (nonzero) digits is 343000, while the sum is 44.

The square root of 78075755 is about 8836.0486078337. The cubic root of 78075755 is about 427.4041461734.

The spelling of 78075755 in words is "seventy-eight million, seventy-five thousand, seven hundred fifty-five".