78361137 has 6 divisors (see below), whose sum is σ = 113188322. Its totient is φ = 52240752.

The previous prime is 78361097. The next prime is 78361139. The reversal of 78361137 is 73116387.

78361137 is a `hidden beast` number, since 7 + 8 + 3 + 611 + 37 = 666.

It can be written as a sum of positive squares in only one way, i.e., 62869041 + 15492096 = 7929^2 + 3936^2 .

It is not a de Polignac number, because 78361137 - 2¹⁶ = 78295601 is a prime.

It is a super-2 number, since 2×78361137² = 12280935583865538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78361139) 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 5 ways as a sum of consecutive naturals, for example, 4353388 + ... + 4353405.

Almost surely, 2^78361137 is an apocalyptic number.

It is an amenable number.

78361137 is a deficient number, since it is larger than the sum of its proper divisors (34827185).

78361137 is a wasteful number, since it uses less digits than its factorization.

78361137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8706799 (or 8706796 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 78361137 is about 8852.1826122149. The cubic root of 78361137 is about 427.9242612800.

The spelling of 78361137 in words is "seventy-eight million, three hundred sixty-one thousand, one hundred thirty-seven".