78947204653 has 4 divisors (see below), whose sum is σ = 78950316640. Its totient is φ = 78944092668.

The previous prime is 78947204641. The next prime is 78947204659. The reversal of 78947204653 is 35640274987.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35640274987 = 43753 ⋅814579.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78947204653 is a prime.

It is a super-2 number, since 2×78947204653² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78947204594 and 78947204603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78947204659) 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, 1517625 + ... + 1568782.

It is an arithmetic number, because the mean of its divisors is an integer number (19737579160).

Almost surely, 2^78947204653 is an apocalyptic number.

It is an amenable number.

78947204653 is a deficient number, since it is larger than the sum of its proper divisors (3111987).

78947204653 is a wasteful number, since it uses less digits than its factorization.

78947204653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3111986.

The product of its (nonzero) digits is 10160640, while the sum is 55.

The spelling of 78947204653 in words is "seventy-eight billion, nine hundred forty-seven million, two hundred four thousand, six hundred fifty-three".