78537065 has 16 divisors (see below), whose sum is σ = 99819648. Its totient is φ = 59195136.

The previous prime is 78537061. The next prime is 78537097. The reversal of 78537065 is 56073587.

It is a cyclic number.

It is not a de Polignac number, because 78537065 - 2² = 78537061 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78537061) by changing a digit.

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, 2609 + ... + 12801.

It is an arithmetic number, because the mean of its divisors is an integer number (6238728).

Almost surely, 2^78537065 is an apocalyptic number.

It is an amenable number.

78537065 is a deficient number, since it is larger than the sum of its proper divisors (21282583).

78537065 is a wasteful number, since it uses less digits than its factorization.

78537065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10288.

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 78537065 is about 8862.1140254456. The cubic root of 78537065 is about 428.2442651014.

The spelling of 78537065 in words is "seventy-eight million, five hundred thirty-seven thousand, sixty-five".