1901431883128 has 8 divisors (see below), whose sum is σ = 3565184780880. Its totient is φ = 950715941560.

The previous prime is 1901431883123. The next prime is 1901431883159. The reversal of 1901431883128 is 8213881341091.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1901431883123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 118839492688 + ... + 118839492703.

It is an arithmetic number, because the mean of its divisors is an integer number (445648097610).

Almost surely, 2^{1901431883128} is an apocalyptic number.

It is an amenable number.

1901431883128 is a deficient number, since it is larger than the sum of its proper divisors (1663752897752).

1901431883128 is a wasteful number, since it uses less digits than its factorization.

1901431883128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237678985397 (or 237678985393 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 49.

The spelling of 1901431883128 in words is "one trillion, nine hundred one billion, four hundred thirty-one million, eight hundred eighty-three thousand, one hundred twenty-eight".