39660520161 has 16 divisors (see below), whose sum is σ = 53129134080. Its totient is φ = 26316240720.

The previous prime is 39660520157. The next prime is 39660520199. The reversal of 39660520161 is 16102506693.

It is not a de Polignac number, because 39660520161 - 2² = 39660520157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39660520061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1500486 + ... + 1526688.

It is an arithmetic number, because the mean of its divisors is an integer number (3320570880).

Almost surely, 2^39660520161 is an apocalyptic number.

It is an amenable number.

39660520161 is a deficient number, since it is larger than the sum of its proper divisors (13468613919).

39660520161 is a wasteful number, since it uses less digits than its factorization.

39660520161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28556.

The product of its (nonzero) digits is 58320, while the sum is 39.

The spelling of 39660520161 in words is "thirty-nine billion, six hundred sixty million, five hundred twenty thousand, one hundred sixty-one".