78235664097 has 4 divisors (see below), whose sum is σ = 104314218800. Its totient is φ = 52157109396.

The previous prime is 78235664083. The next prime is 78235664141. The reversal of 78235664097 is 79046653287.

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 not a de Polignac number, because 78235664097 - 2⁴ = 78235664081 is a prime.

It is a super-2 number, since 2×78235664097² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78235664027) 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, 13039277347 + ... + 13039277352.

It is an arithmetic number, because the mean of its divisors is an integer number (26078554700).

Almost surely, 2^78235664097 is an apocalyptic number.

It is an amenable number.

78235664097 is a deficient number, since it is larger than the sum of its proper divisors (26078554703).

78235664097 is a wasteful number, since it uses less digits than its factorization.

78235664097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26078554702.

The product of its (nonzero) digits is 15240960, while the sum is 57.

The spelling of 78235664097 in words is "seventy-eight billion, two hundred thirty-five million, six hundred sixty-four thousand, ninety-seven".