109516492781 has 2 divisors, whose sum is σ = 109516492782. Its totient is φ = 109516492780.

The previous prime is 109516492739. The next prime is 109516492819. The reversal of 109516492781 is 187294615901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107974674025 + 1541818756 = 328595^2 + 39266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109516492781 is a prime.

It is a super-2 number, since 2×109516492781² (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 (109516492681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54758246390 + 54758246391.

It is an arithmetic number, because the mean of its divisors is an integer number (54758246391).

Almost surely, 2^109516492781 is an apocalyptic number.

It is an amenable number.

109516492781 is a deficient number, since it is larger than the sum of its proper divisors (1).

109516492781 is an equidigital number, since it uses as much as digits as its factorization.

109516492781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 53.

The spelling of 109516492781 in words is "one hundred nine billion, five hundred sixteen million, four hundred ninety-two thousand, seven hundred eighty-one".