88640661833 has 2 divisors, whose sum is σ = 88640661834. Its totient is φ = 88640661832.

The previous prime is 88640661821. The next prime is 88640662043. The reversal of 88640661833 is 33816604688.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83814303049 + 4826358784 = 289507^2 + 69472^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88640661833 is a prime.

It is not a weakly prime, because it can be changed into another prime (88640661533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44320330916 + 44320330917.

It is an arithmetic number, because the mean of its divisors is an integer number (44320330917).

Almost surely, 2^88640661833 is an apocalyptic number.

It is an amenable number.

88640661833 is a deficient number, since it is larger than the sum of its proper divisors (1).

88640661833 is an equidigital number, since it uses as much as digits as its factorization.

88640661833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3981312, while the sum is 53.

The spelling of 88640661833 in words is "eighty-eight billion, six hundred forty million, six hundred sixty-one thousand, eight hundred thirty-three".