2978204645587 has 2 divisors, whose sum is σ = 2978204645588. Its totient is φ = 2978204645586.

The previous prime is 2978204645561. The next prime is 2978204645621. The reversal of 2978204645587 is 7855464028792.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2978204645587 - 2⁷ = 2978204645459 is a prime.

It is not a weakly prime, because it can be changed into another prime (2978204645557) 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, 1489102322793 + 1489102322794.

It is an arithmetic number, because the mean of its divisors is an integer number (1489102322794).

Almost surely, 2^{2978204645587} is an apocalyptic number.

2978204645587 is a deficient number, since it is larger than the sum of its proper divisors (1).

2978204645587 is an equidigital number, since it uses as much as digits as its factorization.

2978204645587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270950400, while the sum is 67.

The spelling of 2978204645587 in words is "two trillion, nine hundred seventy-eight billion, two hundred four million, six hundred forty-five thousand, five hundred eighty-seven".