101019978655579 has 2 divisors, whose sum is σ = 101019978655580. Its totient is φ = 101019978655578.

The previous prime is 101019978655573. The next prime is 101019978655747. The reversal of 101019978655579 is 975556879910101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101019978655579 - 2⁴³ = 92223885633371 is a prime.

It is a super-3 number, since 3×101019978655579³ (a number of 43 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (101019978655573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50509989327789 + 50509989327790.

It is an arithmetic number, because the mean of its divisors is an integer number (50509989327790).

Almost surely, 2^{101019978655579} is an apocalyptic number.

101019978655579 is a deficient number, since it is larger than the sum of its proper divisors (1).

101019978655579 is an equidigital number, since it uses as much as digits as its factorization.

101019978655579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 214326000, while the sum is 73.

The spelling of 101019978655579 in words is "one hundred one trillion, nineteen billion, nine hundred seventy-eight million, six hundred fifty-five thousand, five hundred seventy-nine".