78516273 has 64 divisors (see below), whose sum is σ = 127401984. Its totient is φ = 42504000.

The previous prime is 78516259. The next prime is 78516281. The reversal of 78516273 is 37261587.

It is not a de Polignac number, because 78516273 - 2⁵ = 78516241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78516203) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1105828 + ... + 1105898.

It is an arithmetic number, because the mean of its divisors is an integer number (1990656).

Almost surely, 2^78516273 is an apocalyptic number.

It is an amenable number.

78516273 is a deficient number, since it is larger than the sum of its proper divisors (48885711).

78516273 is a wasteful number, since it uses less digits than its factorization.

78516273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186.

The product of its digits is 70560, while the sum is 39.

The square root of 78516273 is about 8860.9408642649. The cubic root of 78516273 is about 428.2064704600.

The spelling of 78516273 in words is "seventy-eight million, five hundred sixteen thousand, two hundred seventy-three".