3921538540500 has 288 divisors, whose sum is σ = 14154565850880. Its totient is φ = 895330195200.

The previous prime is 3921538540351. The next prime is 3921538540511. The reversal of 3921538540500 is 50458351293.

3921538540500 is a `hidden beast` number, since 3 + 9 + 2 + 1 + 53 + 8 + 540 + 50 + 0 = 666.

3921538540500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 27744006 + ... + 27884994.

Almost surely, 2^{3921538540500} is an apocalyptic number.

3921538540500 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 3921538540500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7077282925440).

3921538540500 is an abundant number, since it is smaller than the sum of its proper divisors (10233027310380).

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

3921538540500 is a wasteful number, since it uses less digits than its factorization.

3921538540500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141904 (or 141889 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 3921538540500 in words is "three trillion, nine hundred twenty-one billion, five hundred thirty-eight million, five hundred forty thousand, five hundred".