8780787991051 has 2 divisors, whose sum is σ = 8780787991052. Its totient is φ = 8780787991050.

The previous prime is 8780787991009. The next prime is 8780787991057. The reversal of 8780787991051 is 1501997870878.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8780787991051 - 2¹¹ = 8780787989003 is a prime.

It is not a weakly prime, because it can be changed into another prime (8780787991057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4390393995525 + 4390393995526.

It is an arithmetic number, because the mean of its divisors is an integer number (4390393995526).

Almost surely, 2^{8780787991051} is an apocalyptic number.

8780787991051 is a deficient number, since it is larger than the sum of its proper divisors (1).

8780787991051 is an equidigital number, since it uses as much as digits as its factorization.

8780787991051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71124480, while the sum is 70.

The spelling of 8780787991051 in words is "eight trillion, seven hundred eighty billion, seven hundred eighty-seven million, nine hundred ninety-one thousand, fifty-one".