84258501661 has 2 divisors, whose sum is σ = 84258501662. Its totient is φ = 84258501660.

The previous prime is 84258501631. The next prime is 84258501689. The reversal of 84258501661 is 16610585248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84236355225 + 22146436 = 290235^2 + 4706^2 .

It is a cyclic number.

It is not a de Polignac number, because 84258501661 - 2⁵ = 84258501629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84258501631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42129250830 + 42129250831.

It is an arithmetic number, because the mean of its divisors is an integer number (42129250831).

Almost surely, 2^84258501661 is an apocalyptic number.

It is an amenable number.

84258501661 is a deficient number, since it is larger than the sum of its proper divisors (1).

84258501661 is an equidigital number, since it uses as much as digits as its factorization.

84258501661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 460800, while the sum is 46.

The spelling of 84258501661 in words is "eighty-four billion, two hundred fifty-eight million, five hundred one thousand, six hundred sixty-one".