3947537079018 has 384 divisors, whose sum is σ = 10156711219200. Its totient is φ = 1097087846400.

The previous prime is 3947537079001. The next prime is 3947537079071. The reversal of 3947537079018 is 8109707357493.

3947537079018 is a `hidden beast` number, since 3 + 9 + 4 + 7 + 537 + 0 + 7 + 90 + 1 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 3866343348 + ... + 3866344368.

It is an arithmetic number, because the mean of its divisors is an integer number (26449768800).

Almost surely, 2^{3947537079018} is an apocalyptic number.

3947537079018 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3947537079018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5078355609600).

3947537079018 is an abundant number, since it is smaller than the sum of its proper divisors (6209174140182).

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

3947537079018 is a wasteful number, since it uses less digits than its factorization.

3947537079018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438 (or 1435 counting only the distinct ones).

The product of its (nonzero) digits is 40007520, while the sum is 63.

The spelling of 3947537079018 in words is "three trillion, nine hundred forty-seven billion, five hundred thirty-seven million, seventy-nine thousand, eighteen".