39401939479936 has 128 divisors (see below), whose sum is σ = 88313465180160. Its totient is φ = 17355714324480.

The previous prime is 39401939479891. The next prime is 39401939479951. The reversal of 39401939479936 is 63997493910493.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5126890 + ... + 10251286.

It is an arithmetic number, because the mean of its divisors is an integer number (689948946720).

Almost surely, 2^{39401939479936} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39401939479936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44156732590080).

39401939479936 is an abundant number, since it is smaller than the sum of its proper divisors (48911525700224).

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

39401939479936 is a wasteful number, since it uses less digits than its factorization.

39401939479936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5124592 (or 5124580 counting only the distinct ones).

The product of its (nonzero) digits is 1071385056, while the sum is 76.

The spelling of 39401939479936 in words is "thirty-nine trillion, four hundred one billion, nine hundred thirty-nine million, four hundred seventy-nine thousand, nine hundred thirty-six".