39660535362240 has 2016 divisors, whose sum is σ = 159642547384320. Its totient is φ = 9319692017664.

The previous prime is 39660535362187. The next prime is 39660535362271. The reversal of 39660535362240 is 4226353506693.

39660535362240 is a `hidden beast` number, since 3 + 9 + 6 + 6 + 0 + 5 + 3 + 5 + 3 + 622 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 55160688601 + ... + 55160689319.

It is an arithmetic number, because the mean of its divisors is an integer number (79187771520).

Almost surely, 2^{39660535362240} is an apocalyptic number.

39660535362240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39660535362240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79821273692160).

39660535362240 is an abundant number, since it is smaller than the sum of its proper divisors (119982012022080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39660535362240 is an equidigital number, since it uses as much as digits as its factorization.

39660535362240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863 (or 832 counting only the distinct ones).

The product of its (nonzero) digits is 20995200, while the sum is 54.

The spelling of 39660535362240 in words is "thirty-nine trillion, six hundred sixty billion, five hundred thirty-five million, three hundred sixty-two thousand, two hundred forty".