39661120801 has 3 divisors (see below), whose sum is σ = 39661319953. Its totient is φ = 39660921650.

The previous prime is 39661120789. The next prime is 39661120813. The reversal of 39661120801 is 10802116693.

The square root of 39661120801 is 199151.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10802116693 = 17 ⋅635418629.

It is an interprime number because it is at equal distance from previous prime (39661120789) and next prime (39661120813).

It is not a de Polignac number, because 39661120801 - 2¹⁷ = 39660989729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39661120841) 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, 99576 + ... + 298726.

Almost surely, 2^39661120801 is an apocalyptic number.

39661120801 is the 199151-st square number.

39661120801 is the 99576-th centered octagonal number.

It is an amenable number.

39661120801 is a deficient number, since it is larger than the sum of its proper divisors (199152).

39661120801 is an frugal number, since it uses more digits than its factorization.

39661120801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398302 (or 199151 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 39661120801 in words is "thirty-nine billion, six hundred sixty-one million, one hundred twenty thousand, eight hundred one".