39861005651040 has 192 divisors, whose sum is σ = 143572155471360. Its totient is φ = 9106481602560.

The previous prime is 39861005651029. The next prime is 39861005651053. The reversal of 39861005651040 is 4015650016893.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3652120 + ... + 9646760.

It is an arithmetic number, because the mean of its divisors is an integer number (747771643080).

Almost surely, 2^{39861005651040} is an apocalyptic number.

39861005651040 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 39861005651040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71786077735680).

39861005651040 is an abundant number, since it is smaller than the sum of its proper divisors (103711149820320).

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

39861005651040 is a wasteful number, since it uses less digits than its factorization.

39861005651040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5996645 (or 5996637 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 48.

The spelling of 39861005651040 in words is "thirty-nine trillion, eight hundred sixty-one billion, five million, six hundred fifty-one thousand, forty".