63839001970091 has 2 divisors, whose sum is σ = 63839001970092. Its totient is φ = 63839001970090.

The previous prime is 63839001970031. The next prime is 63839001970097. The reversal of 63839001970091 is 19007910093836.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63839001970091 - 2⁶ = 63839001970027 is a prime.

It is not a weakly prime, because it can be changed into another prime (63839001970097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31919500985045 + 31919500985046.

It is an arithmetic number, because the mean of its divisors is an integer number (31919500985046).

Almost surely, 2^{63839001970091} is an apocalyptic number.

63839001970091 is a deficient number, since it is larger than the sum of its proper divisors (1).

63839001970091 is an equidigital number, since it uses as much as digits as its factorization.

63839001970091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2204496, while the sum is 56.

The spelling of 63839001970091 in words is "sixty-three trillion, eight hundred thirty-nine billion, one million, nine hundred seventy thousand, ninety-one".