2788712215397 has 2 divisors, whose sum is σ = 2788712215398. Its totient is φ = 2788712215396.

The previous prime is 2788712215363. The next prime is 2788712215411. The reversal of 2788712215397 is 7935122178872.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1761542127361 + 1027170088036 = 1327231^2 + 1013494^2 .

It is a cyclic number.

It is not a de Polignac number, because 2788712215397 - 2¹² = 2788712211301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2788712215097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1394356107698 + 1394356107699.

It is an arithmetic number, because the mean of its divisors is an integer number (1394356107699).

Almost surely, 2^{2788712215397} is an apocalyptic number.

It is an amenable number.

2788712215397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2788712215397 is an equidigital number, since it uses as much as digits as its factorization.

2788712215397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23708160, while the sum is 62.

The spelling of 2788712215397 in words is "two trillion, seven hundred eighty-eight billion, seven hundred twelve million, two hundred fifteen thousand, three hundred ninety-seven".