111651617137 has 2 divisors, whose sum is σ = 111651617138. Its totient is φ = 111651617136.

The previous prime is 111651617131. The next prime is 111651617141. The reversal of 111651617137 is 731716156111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96959995456 + 14691621681 = 311384^2 + 121209^2 .

It is an emirp because it is prime and its reverse (731716156111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111651617137 is a prime.

It is a super-3 number, since 3×111651617137³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111651617137.

It is not a weakly prime, because it can be changed into another prime (111651617131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55825808568 + 55825808569.

It is an arithmetic number, because the mean of its divisors is an integer number (55825808569).

Almost surely, 2^111651617137 is an apocalyptic number.

It is an amenable number.

111651617137 is a deficient number, since it is larger than the sum of its proper divisors (1).

111651617137 is an equidigital number, since it uses as much as digits as its factorization.

111651617137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 40.

The spelling of 111651617137 in words is "one hundred eleven billion, six hundred fifty-one million, six hundred seventeen thousand, one hundred thirty-seven".