98578019669 has 2 divisors, whose sum is σ = 98578019670. Its totient is φ = 98578019668.

The previous prime is 98578019623. The next prime is 98578019767. The reversal of 98578019669 is 96691087589.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96938822500 + 1639197169 = 311350^2 + 40487^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98578019669 is a prime.

It is a super-2 number, since 2×98578019669² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 98578019599 and 98578019608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98578019369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49289009834 + 49289009835.

It is an arithmetic number, because the mean of its divisors is an integer number (49289009835).

Almost surely, 2^98578019669 is an apocalyptic number.

It is an amenable number.

98578019669 is a deficient number, since it is larger than the sum of its proper divisors (1).

98578019669 is an equidigital number, since it uses as much as digits as its factorization.

98578019669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58786560, while the sum is 68.

The spelling of 98578019669 in words is "ninety-eight billion, five hundred seventy-eight million, nineteen thousand, six hundred sixty-nine".