768646145 has 4 divisors (see below), whose sum is σ = 922375380. Its totient is φ = 614916912.

The previous prime is 768646133. The next prime is 768646157. The reversal of 768646145 is 541646867.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (768646133) and next prime (768646157).

It can be written as a sum of positive squares in 2 ways, for example, as 121859521 + 646786624 = 11039^2 + 25432^2 .

It is a cyclic number.

It is not a de Polignac number, because 768646145 - 2¹⁰ = 768645121 is a prime.

It is a super-2 number, since 2×768646145² = 1181633792446722050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 768646145.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76864610 + ... + 76864619.

It is an arithmetic number, because the mean of its divisors is an integer number (230593845).

Almost surely, 2^768646145 is an apocalyptic number.

It is an amenable number.

768646145 is a deficient number, since it is larger than the sum of its proper divisors (153729235).

768646145 is a wasteful number, since it uses less digits than its factorization.

768646145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153729234.

The product of its digits is 967680, while the sum is 47.

The square root of 768646145 is about 27724.4683447672. The cubic root of 768646145 is about 916.0281454488.

The spelling of 768646145 in words is "seven hundred sixty-eight million, six hundred forty-six thousand, one hundred forty-five".