3900851555128 has 32 divisors (see below), whose sum is σ = 8448368344560. Its totient is φ = 1668813498880.

The previous prime is 3900851555119. The next prime is 3900851555131. The reversal of 3900851555128 is 8215551580093.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1303759051 + ... + 1303762042.

Almost surely, 2^{3900851555128} is an apocalyptic number.

It is an amenable number.

3900851555128 is an abundant number, since it is smaller than the sum of its proper divisors (4547516789432).

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

3900851555128 is a wasteful number, since it uses less digits than its factorization.

3900851555128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2607521127 (or 2607521123 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 52.

The spelling of 3900851555128 in words is "three trillion, nine hundred billion, eight hundred fifty-one million, five hundred fifty-five thousand, one hundred twenty-eight".