78334304537 has 4 divisors (see below), whose sum is σ = 78342562356. Its totient is φ = 78326046720.

The previous prime is 78334304497. The next prime is 78334304551. The reversal of 78334304537 is 73540343387.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30213740041 + 48120564496 = 173821^2 + 219364^2 .

It is a cyclic number.

It is not a de Polignac number, because 78334304537 - 2¹⁰ = 78334303513 is a prime.

It is a super-2 number, since 2×78334304537² (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 = 78334304491 and 78334304500.

It is not an unprimeable number, because it can be changed into a prime (78334304597) 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, 4114664 + ... + 4133657.

It is an arithmetic number, because the mean of its divisors is an integer number (19585640589).

Almost surely, 2^78334304537 is an apocalyptic number.

It is an amenable number.

78334304537 is a deficient number, since it is larger than the sum of its proper divisors (8257819).

78334304537 is an equidigital number, since it uses as much as digits as its factorization.

78334304537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8257818.

The product of its (nonzero) digits is 2540160, while the sum is 47.

The spelling of 78334304537 in words is "seventy-eight billion, three hundred thirty-four million, three hundred four thousand, five hundred thirty-seven".