7772001581987 has 2 divisors, whose sum is σ = 7772001581988. Its totient is φ = 7772001581986.

The previous prime is 7772001581983. The next prime is 7772001582031. The reversal of 7772001581987 is 7891851002777.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7772001581987 - 2² = 7772001581983 is a prime.

It is not a weakly prime, because it can be changed into another prime (7772001581983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3886000790993 + 3886000790994.

It is an arithmetic number, because the mean of its divisors is an integer number (3886000790994).

Almost surely, 2^{7772001581987} is an apocalyptic number.

7772001581987 is a deficient number, since it is larger than the sum of its proper divisors (1).

7772001581987 is an equidigital number, since it uses as much as digits as its factorization.

7772001581987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13829760, while the sum is 62.

The spelling of 7772001581987 in words is "seven trillion, seven hundred seventy-two billion, one million, five hundred eighty-one thousand, nine hundred eighty-seven".