38540543964 has 72 divisors (see below), whose sum is σ = 97807731840. Its totient is φ = 11806247232.

The previous prime is 38540543903. The next prime is 38540544011. The reversal of 38540543964 is 46934504583.

38540543964 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 418497 + ... + 502215.

It is an arithmetic number, because the mean of its divisors is an integer number (1358440720).

Almost surely, 2^38540543964 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 38540543964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48903865920).

38540543964 is an abundant number, since it is smaller than the sum of its proper divisors (59267187876).

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

38540543964 is a wasteful number, since it uses less digits than its factorization.

38540543964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83979 (or 83964 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 51.

The spelling of 38540543964 in words is "thirty-eight billion, five hundred forty million, five hundred forty-three thousand, nine hundred sixty-four".