109661532465 has 32 divisors (see below), whose sum is σ = 179233191936. Its totient is φ = 57228482240.

The previous prime is 109661532451. The next prime is 109661532467. The reversal of 109661532465 is 564235166901.

It is not a de Polignac number, because 109661532465 - 2⁸ = 109661532209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (109661532467) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3511570 + ... + 3542660.

It is an arithmetic number, because the mean of its divisors is an integer number (5601037248).

Almost surely, 2^109661532465 is an apocalyptic number.

109661532465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

109661532465 is a deficient number, since it is larger than the sum of its proper divisors (69571659471).

109661532465 is a wasteful number, since it uses less digits than its factorization.

109661532465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36149.

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 109661532465 in words is "one hundred nine billion, six hundred sixty-one million, five hundred thirty-two thousand, four hundred sixty-five".