107801245561 has 3 divisors (see below), whose sum is σ = 107801573893. Its totient is φ = 107800917230.

The previous prime is 107801245477. The next prime is 107801245567. The reversal of 107801245561 is 165542108701.

The square root of 107801245561 is 328331.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-107801245561 is a prime.

It is a super-2 number, since 2×107801245561² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (107801245567) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 164166 + ... + 492496.

Almost surely, 2^107801245561 is an apocalyptic number.

107801245561 is the 328331-st square number.

107801245561 is the 164166-th centered octagonal number.

It is an amenable number.

107801245561 is a deficient number, since it is larger than the sum of its proper divisors (328332).

107801245561 is an frugal number, since it uses more digits than its factorization.

107801245561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656662 (or 328331 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 40.

The spelling of 107801245561 in words is "one hundred seven billion, eight hundred one million, two hundred forty-five thousand, five hundred sixty-one".