78052564 has 6 divisors (see below), whose sum is σ = 136591994. Its totient is φ = 39026280.

The previous prime is 78052537. The next prime is 78052567. The reversal of 78052564 is 46525087.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 68392900 + 9659664 = 8270^2 + 3108^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78052567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9756567 + ... + 9756574.

Almost surely, 2^78052564 is an apocalyptic number.

It is an amenable number.

78052564 is a deficient number, since it is larger than the sum of its proper divisors (58539430).

78052564 is a wasteful number, since it uses less digits than its factorization.

78052564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19513145 (or 19513143 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 78052564 is about 8834.7362156433. The cubic root of 78052564 is about 427.3618244091.

The spelling of 78052564 in words is "seventy-eight million, fifty-two thousand, five hundred sixty-four".