78145763 has 4 divisors (see below), whose sum is σ = 78542640. Its totient is φ = 77748888.

The previous prime is 78145747. The next prime is 78145783. The reversal of 78145763 is 36754187.

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

It is a cyclic number.

It is not a de Polignac number, because 78145763 - 2⁴ = 78145747 is a prime.

It is a super-2 number, since 2×78145763² = 12213520549704338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78145763.

It is not an unprimeable number, because it can be changed into a prime (78145723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198143 + ... + 198536.

It is an arithmetic number, because the mean of its divisors is an integer number (19635660).

Almost surely, 2^78145763 is an apocalyptic number.

78145763 is a deficient number, since it is larger than the sum of its proper divisors (396877).

78145763 is a wasteful number, since it uses less digits than its factorization.

78145763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396876.

The product of its digits is 141120, while the sum is 41.

The square root of 78145763 is about 8840.0092194522. The cubic root of 78145763 is about 427.5318544940.

The spelling of 78145763 in words is "seventy-eight million, one hundred forty-five thousand, seven hundred sixty-three".