78290737433 has 4 divisors (see below), whose sum is σ = 78291729588. Its totient is φ = 78289745280.

The previous prime is 78290737411. The next prime is 78290737457. The reversal of 78290737433 is 33473709287.

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 15446264089 + 62844473344 = 124283^2 + 250688^2 .

It is a cyclic number.

It is not a de Polignac number, because 78290737433 - 2²⁰ = 78289688857 is a prime.

It is a super-2 number, since 2×78290737433² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78290737463) 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, 366416 + ... + 539297.

It is an arithmetic number, because the mean of its divisors is an integer number (19572932397).

Almost surely, 2^78290737433 is an apocalyptic number.

It is an amenable number.

78290737433 is a deficient number, since it is larger than the sum of its proper divisors (992155).

78290737433 is an equidigital number, since it uses as much as digits as its factorization.

78290737433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992154.

The product of its (nonzero) digits is 5334336, while the sum is 53.

The spelling of 78290737433 in words is "seventy-eight billion, two hundred ninety million, seven hundred thirty-seven thousand, four hundred thirty-three".