78076505 has 16 divisors (see below), whose sum is σ = 103363344. Its totient is φ = 56248320.

The previous prime is 78076489. The next prime is 78076517. The reversal of 78076505 is 50567087.

It can be written as a sum of positive squares in 8 ways, for example, as 14523721 + 63552784 = 3811^2 + 7972^2 .

It is not a de Polignac number, because 78076505 - 2⁴ = 78076489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11984 + ... + 17313.

It is an arithmetic number, because the mean of its divisors is an integer number (6460209).

Almost surely, 2^78076505 is an apocalyptic number.

It is an amenable number.

78076505 is a deficient number, since it is larger than the sum of its proper divisors (25286839).

78076505 is a wasteful number, since it uses less digits than its factorization.

78076505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29356.

The product of its (nonzero) digits is 58800, while the sum is 38.

The square root of 78076505 is about 8836.0910475164. The cubic root of 78076505 is about 427.4055147250.

The spelling of 78076505 in words is "seventy-eight million, seventy-six thousand, five hundred five".