78536818510 has 32 divisors (see below), whose sum is σ = 142117807392. Its totient is φ = 31247892480.

The previous prime is 78536818487. The next prime is 78536818511. The reversal of 78536818510 is 1581863587.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78536818511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4026702 + ... + 4046158.

It is an arithmetic number, because the mean of its divisors is an integer number (4441181481).

Almost surely, 2^78536818510 is an apocalyptic number.

78536818510 is a deficient number, since it is larger than the sum of its proper divisors (63580988882).

78536818510 is a wasteful number, since it uses less digits than its factorization.

78536818510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21588.

The product of its (nonzero) digits is 1612800, while the sum is 52.

The spelling of 78536818510 in words is "seventy-eight billion, five hundred thirty-six million, eight hundred eighteen thousand, five hundred ten".