101621636447 has 2 divisors, whose sum is σ = 101621636448. Its totient is φ = 101621636446.

The previous prime is 101621636407. The next prime is 101621636471. The reversal of 101621636447 is 744636126101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101621636447 - 2²⁴ = 101604859231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101621636407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50810818223 + 50810818224.

It is an arithmetic number, because the mean of its divisors is an integer number (50810818224).

Almost surely, 2^101621636447 is an apocalyptic number.

101621636447 is a deficient number, since it is larger than the sum of its proper divisors (1).

101621636447 is an equidigital number, since it uses as much as digits as its factorization.

101621636447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 101621636447 in words is "one hundred one billion, six hundred twenty-one million, six hundred thirty-six thousand, four hundred forty-seven".