111653515381 has 2 divisors, whose sum is σ = 111653515382. Its totient is φ = 111653515380.

The previous prime is 111653515357. The next prime is 111653515471. The reversal of 111653515381 is 183515356111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110719235025 + 934280356 = 332745^2 + 30566^2 .

It is a cyclic number.

It is not a de Polignac number, because 111653515381 - 2¹¹ = 111653513333 is a prime.

It is a super-2 number, since 2×111653515381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111653513381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55826757690 + 55826757691.

It is an arithmetic number, because the mean of its divisors is an integer number (55826757691).

Almost surely, 2^111653515381 is an apocalyptic number.

It is an amenable number.

111653515381 is a deficient number, since it is larger than the sum of its proper divisors (1).

111653515381 is an equidigital number, since it uses as much as digits as its factorization.

111653515381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54000, while the sum is 40.

The spelling of 111653515381 in words is "one hundred eleven billion, six hundred fifty-three million, five hundred fifteen thousand, three hundred eighty-one".