635432572991 has 2 divisors, whose sum is σ = 635432572992. Its totient is φ = 635432572990.

The previous prime is 635432572963. The next prime is 635432573051. The reversal of 635432572991 is 199275234536.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 635432572991 - 2¹⁴ = 635432556607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (635432574991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317716286495 + 317716286496.

It is an arithmetic number, because the mean of its divisors is an integer number (317716286496).

Almost surely, 2^635432572991 is an apocalyptic number.

635432572991 is a deficient number, since it is larger than the sum of its proper divisors (1).

635432572991 is an equidigital number, since it uses as much as digits as its factorization.

635432572991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12247200, while the sum is 56.

The spelling of 635432572991 in words is "six hundred thirty-five billion, four hundred thirty-two million, five hundred seventy-two thousand, nine hundred ninety-one".