78652897571 has 4 divisors (see below), whose sum is σ = 78958940232. Its totient is φ = 78346854912.

The previous prime is 78652897567. The next prime is 78652897597. The reversal of 78652897571 is 17579825687.

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

It is a cyclic number.

It is not a de Polignac number, because 78652897571 - 2² = 78652897567 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78652897498 and 78652897507.

It is not an unprimeable number, because it can be changed into a prime (78652897511) 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, 153020945 + ... + 153021458.

It is an arithmetic number, because the mean of its divisors is an integer number (19739735058).

Almost surely, 2^78652897571 is an apocalyptic number.

78652897571 is a deficient number, since it is larger than the sum of its proper divisors (306042661).

78652897571 is a wasteful number, since it uses less digits than its factorization.

78652897571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306042660.

The product of its digits is 59270400, while the sum is 65.

Multiplying 78652897571 by its sum of digits (65), we get a palindrome (5112438342115).

The spelling of 78652897571 in words is "seventy-eight billion, six hundred fifty-two million, eight hundred ninety-seven thousand, five hundred seventy-one".