111662450639 has 2 divisors, whose sum is σ = 111662450640. Its totient is φ = 111662450638.

The previous prime is 111662450609. The next prime is 111662450707. The reversal of 111662450639 is 936054266111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111662450639 is a prime.

It is a super-2 number, since 2×111662450639² (a number of 23 digits) contains 22 as substring.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 111662450639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111662450609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55831225319 + 55831225320.

It is an arithmetic number, because the mean of its divisors is an integer number (55831225320).

Almost surely, 2^111662450639 is an apocalyptic number.

111662450639 is a deficient number, since it is larger than the sum of its proper divisors (1).

111662450639 is an equidigital number, since it uses as much as digits as its factorization.

111662450639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 111662450639 in words is "one hundred eleven billion, six hundred sixty-two million, four hundred fifty thousand, six hundred thirty-nine".