78504624130253 has 4 divisors (see below), whose sum is σ = 78505433778588. Its totient is φ = 78503814481920.

The previous prime is 78504624130249. The next prime is 78504624130259. The reversal of 78504624130253 is 35203142640587.

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

It can be written as a sum of positive squares in 2 ways, for example, as 32008290662569 + 46496333467684 = 5657587^2 + 6818822^2 .

It is a cyclic number.

It is not a de Polignac number, because 78504624130253 - 2² = 78504624130249 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78504624130259) 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, 404678708 + ... + 404872653.

It is an arithmetic number, because the mean of its divisors is an integer number (19626358444647).

Almost surely, 2^{78504624130253} is an apocalyptic number.

It is an amenable number.

78504624130253 is a deficient number, since it is larger than the sum of its proper divisors (809648335).

78504624130253 is an equidigital number, since it uses as much as digits as its factorization.

78504624130253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809648334.

The product of its (nonzero) digits is 4838400, while the sum is 50.

The spelling of 78504624130253 in words is "seventy-eight trillion, five hundred four billion, six hundred twenty-four million, one hundred thirty thousand, two hundred fifty-three".