78504663 has 4 divisors (see below), whose sum is σ = 104672888. Its totient is φ = 52336440.

The previous prime is 78504661. The next prime is 78504683. The reversal of 78504663 is 36640587.

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

It is not a de Polignac number, because 78504663 - 2¹ = 78504661 is a prime.

It is a super-2 number, since 2×78504663² = 12325964225487138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78504661) 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, 13084108 + ... + 13084113.

It is an arithmetic number, because the mean of its divisors is an integer number (26168222).

Almost surely, 2^78504663 is an apocalyptic number.

78504663 is a deficient number, since it is larger than the sum of its proper divisors (26168225).

78504663 is a wasteful number, since it uses less digits than its factorization.

78504663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26168224.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 78504663 is about 8860.2857177407. The cubic root of 78504663 is about 428.1853634886.

The spelling of 78504663 in words is "seventy-eight million, five hundred four thousand, six hundred sixty-three".