1025858662391 has 2 divisors, whose sum is σ = 1025858662392. Its totient is φ = 1025858662390.

The previous prime is 1025858662369. The next prime is 1025858662421. The reversal of 1025858662391 is 1932668585201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1025858662391 - 2⁶ = 1025858662327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1025858662331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512929331195 + 512929331196.

It is an arithmetic number, because the mean of its divisors is an integer number (512929331196).

Almost surely, 2^{1025858662391} is an apocalyptic number.

1025858662391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025858662391 is an equidigital number, since it uses as much as digits as its factorization.

1025858662391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6220800, while the sum is 56.

The spelling of 1025858662391 in words is "one trillion, twenty-five billion, eight hundred fifty-eight million, six hundred sixty-two thousand, three hundred ninety-one".