78377600369 has 2 divisors, whose sum is σ = 78377600370. Its totient is φ = 78377600368.

The previous prime is 78377600341. The next prime is 78377600417. The reversal of 78377600369 is 96300677387.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68690119744 + 9687480625 = 262088^2 + 98425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78377600369 is a prime.

It is a super-2 number, since 2×78377600369² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78377600339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39188800184 + 39188800185.

It is an arithmetic number, because the mean of its divisors is an integer number (39188800185).

Almost surely, 2^78377600369 is an apocalyptic number.

It is an amenable number.

78377600369 is a deficient number, since it is larger than the sum of its proper divisors (1).

78377600369 is an equidigital number, since it uses as much as digits as its factorization.

78377600369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8001504, while the sum is 56.

The spelling of 78377600369 in words is "seventy-eight billion, three hundred seventy-seven million, six hundred thousand, three hundred sixty-nine".