89861644907 has 2 divisors, whose sum is σ = 89861644908. Its totient is φ = 89861644906.

The previous prime is 89861644871. The next prime is 89861644931. The reversal of 89861644907 is 70944616898.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89861644907 - 2¹⁴ = 89861628523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89861644907.

It is not a weakly prime, because it can be changed into another prime (89861644937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44930822453 + 44930822454.

It is an arithmetic number, because the mean of its divisors is an integer number (44930822454).

Almost surely, 2^89861644907 is an apocalyptic number.

89861644907 is a deficient number, since it is larger than the sum of its proper divisors (1).

89861644907 is an equidigital number, since it uses as much as digits as its factorization.

89861644907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20901888, while the sum is 62.

The spelling of 89861644907 in words is "eighty-nine billion, eight hundred sixty-one million, six hundred forty-four thousand, nine hundred seven".