10178900981 has 2 divisors, whose sum is σ = 10178900982. Its totient is φ = 10178900980.

The previous prime is 10178900899. The next prime is 10178901037. The reversal of 10178900981 is 18900987101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7129100356 + 3049800625 = 84434^2 + 55225^2 .

It is an emirp because it is prime and its reverse (18900987101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10178900981 is a prime.

It is a super-2 number, since 2×10178900981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10178000981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5089450490 + 5089450491.

It is an arithmetic number, because the mean of its divisors is an integer number (5089450491).

Almost surely, 2^10178900981 is an apocalyptic number.

It is an amenable number.

10178900981 is a deficient number, since it is larger than the sum of its proper divisors (1).

10178900981 is an equidigital number, since it uses as much as digits as its factorization.

10178900981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 44.

The spelling of 10178900981 in words is "ten billion, one hundred seventy-eight million, nine hundred thousand, nine hundred eighty-one".