78373490659 has 4 divisors (see below), whose sum is σ = 82498411240. Its totient is φ = 74248570080.

The previous prime is 78373490639. The next prime is 78373490683. The reversal of 78373490659 is 95609437387.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78373490659 is a prime.

It is a super-2 number, since 2×78373490659² (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 = 78373490597 and 78373490606.

It is not an unprimeable number, because it can be changed into a prime (78373490639) 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, 2062460262 + ... + 2062460299.

It is an arithmetic number, because the mean of its divisors is an integer number (20624602810).

Almost surely, 2^78373490659 is an apocalyptic number.

78373490659 is a deficient number, since it is larger than the sum of its proper divisors (4124920581).

78373490659 is a wasteful number, since it uses less digits than its factorization.

78373490659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4124920580.

The product of its (nonzero) digits is 34292160, while the sum is 61.

The spelling of 78373490659 in words is "seventy-eight billion, three hundred seventy-three million, four hundred ninety thousand, six hundred fifty-nine".