109561662001 has 9 divisors (see below), whose sum is σ = 120431283609. Its totient is φ = 99598200900.

The previous prime is 109561661981. The next prime is 109561662011. The reversal of 109561662001 is 100266165901.

The square root of 109561662001 is 331001.

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

It is not a de Polignac number, because 109561662001 - 2⁵ = 109561661969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109561662011) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3625966 + ... + 3656056.

Almost surely, 2^109561662001 is an apocalyptic number.

109561662001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

109561662001 is the 331001-st square number.

109561662001 is the 165501-st centered octagonal number.

It is an amenable number.

109561662001 is a deficient number, since it is larger than the sum of its proper divisors (10869621608).

109561662001 is an frugal number, since it uses more digits than its factorization.

109561662001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60204 (or 30102 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The spelling of 109561662001 in words is "one hundred nine billion, five hundred sixty-one million, six hundred sixty-two thousand, one".