3811903945920 has 252 divisors, whose sum is σ = 15251992258464. Its totient is φ = 871292298240.

The previous prime is 3811903945907. The next prime is 3811903945921. The reversal of 3811903945920 is 295493091183.

3811903945920 is a `hidden beast` number, since 3 + 8 + 1 + 19 + 0 + 39 + 4 + 592 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (252).

It is a super-2 number, since 2×3811903945920² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3811903945921) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 13364776 + ... + 13647015.

Almost surely, 2^{3811903945920} is an apocalyptic number.

3811903945920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3811903945920 is an abundant number, since it is smaller than the sum of its proper divisors (11440088312544).

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

3811903945920 is a wasteful number, since it uses less digits than its factorization.

3811903945920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27011828 (or 27011808 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 3811903945920 in words is "three trillion, eight hundred eleven billion, nine hundred three million, nine hundred forty-five thousand, nine hundred twenty".