5851013783981 has 2 divisors, whose sum is σ = 5851013783982. Its totient is φ = 5851013783980.

The previous prime is 5851013783977. The next prime is 5851013784041. The reversal of 5851013783981 is 1893873101585.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4091278881481 + 1759734902500 = 2022691^2 + 1326550^2 .

It is a cyclic number.

It is not a de Polignac number, because 5851013783981 - 2² = 5851013783977 is a prime.

It is a super-2 number, since 2×5851013783981² (a number of 26 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5851013783981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5851013783921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2925506891990 + 2925506891991.

It is an arithmetic number, because the mean of its divisors is an integer number (2925506891991).

Almost surely, 2^{5851013783981} is an apocalyptic number.

It is an amenable number.

5851013783981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5851013783981 is an equidigital number, since it uses as much as digits as its factorization.

5851013783981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7257600, while the sum is 59.

The spelling of 5851013783981 in words is "five trillion, eight hundred fifty-one billion, thirteen million, seven hundred eighty-three thousand, nine hundred eighty-one".