78090051337 has 2 divisors, whose sum is σ = 78090051338. Its totient is φ = 78090051336.

The previous prime is 78090051331. The next prime is 78090051349. The reversal of 78090051337 is 73315009087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51095889936 + 26994161401 = 226044^2 + 164299^2 .

It is an emirp because it is prime and its reverse (73315009087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78090051337 - 2³¹ = 75942567689 is a prime.

It is a super-2 number, since 2×78090051337² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78090051293 and 78090051302.

It is not a weakly prime, because it can be changed into another prime (78090051331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39045025668 + 39045025669.

It is an arithmetic number, because the mean of its divisors is an integer number (39045025669).

Almost surely, 2^78090051337 is an apocalyptic number.

It is an amenable number.

78090051337 is a deficient number, since it is larger than the sum of its proper divisors (1).

78090051337 is an equidigital number, since it uses as much as digits as its factorization.

78090051337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 43.

The spelling of 78090051337 in words is "seventy-eight billion, ninety million, fifty-one thousand, three hundred thirty-seven".