78530640953 has 4 divisors (see below), whose sum is σ = 79000884480. Its totient is φ = 78060397428.

The previous prime is 78530640919. The next prime is 78530640961. The reversal of 78530640953 is 35904603587.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78530640953 - 2³⁰ = 77456899129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78530640553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235121513 + ... + 235121846.

It is an arithmetic number, because the mean of its divisors is an integer number (19750221120).

Almost surely, 2^78530640953 is an apocalyptic number.

It is an amenable number.

78530640953 is a deficient number, since it is larger than the sum of its proper divisors (470243527).

78530640953 is a wasteful number, since it uses less digits than its factorization.

78530640953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470243526.

The product of its (nonzero) digits is 2721600, while the sum is 50.

The spelling of 78530640953 in words is "seventy-eight billion, five hundred thirty million, six hundred forty thousand, nine hundred fifty-three".