78512465 has 16 divisors (see below), whose sum is σ = 99696000. Its totient is φ = 59190912.

The previous prime is 78512461. The next prime is 78512509. The reversal of 78512465 is 56421587.

It is a cyclic number.

It is not a de Polignac number, because 78512465 - 2² = 78512461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78512461) 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, 16829 + ... + 20981.

It is an arithmetic number, because the mean of its divisors is an integer number (6231000).

Almost surely, 2^78512465 is an apocalyptic number.

It is an amenable number.

78512465 is a deficient number, since it is larger than the sum of its proper divisors (21183535).

78512465 is a wasteful number, since it uses less digits than its factorization.

78512465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4376.

The product of its digits is 67200, while the sum is 38.

The square root of 78512465 is about 8860.7259860578. The cubic root of 78512465 is about 428.1995477481.

The spelling of 78512465 in words is "seventy-eight million, five hundred twelve thousand, four hundred sixty-five".