10033640785981 has 2 divisors, whose sum is σ = 10033640785982. Its totient is φ = 10033640785980.

The previous prime is 10033640785963. The next prime is 10033640786027. The reversal of 10033640785981 is 18958704633001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8859254602500 + 1174386183481 = 2976450^2 + 1083691^2 .

It is a cyclic number.

It is not a de Polignac number, because 10033640785981 - 2⁷ = 10033640785853 is a prime.

It is a super-2 number, since 2×10033640785981² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10033640585981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5016820392990 + 5016820392991.

It is an arithmetic number, because the mean of its divisors is an integer number (5016820392991).

Almost surely, 2^{10033640785981} is an apocalyptic number.

It is an amenable number.

10033640785981 is a deficient number, since it is larger than the sum of its proper divisors (1).

10033640785981 is an equidigital number, since it uses as much as digits as its factorization.

10033640785981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 10033640785981 in words is "ten trillion, thirty-three billion, six hundred forty million, seven hundred eighty-five thousand, nine hundred eighty-one".