981154553111 has 2 divisors, whose sum is σ = 981154553112. Its totient is φ = 981154553110.

The previous prime is 981154553089. The next prime is 981154553129. The reversal of 981154553111 is 111355451189.

It is a strong prime.

It is an emirp because it is prime and its reverse (111355451189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 981154553111 - 2¹⁸ = 981154290967 is a prime.

It is a super-2 number, since 2×981154553111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981154553411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490577276555 + 490577276556.

It is an arithmetic number, because the mean of its divisors is an integer number (490577276556).

Almost surely, 2^981154553111 is an apocalyptic number.

981154553111 is a deficient number, since it is larger than the sum of its proper divisors (1).

981154553111 is an equidigital number, since it uses as much as digits as its factorization.

981154553111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108000, while the sum is 44.

The spelling of 981154553111 in words is "nine hundred eighty-one billion, one hundred fifty-four million, five hundred fifty-three thousand, one hundred eleven".