1901432991120 has 160 divisors (see below), whose sum is σ = 6388294789632. Its totient is φ = 465063745536.

The previous prime is 1901432991083. The next prime is 1901432991127. The reversal of 1901432991120 is 211992341091.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1901432991127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1451032 + ... + 2430711.

Almost surely, 2^{1901432991120} is an apocalyptic number.

1901432991120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1901432991120 is an abundant number, since it is smaller than the sum of its proper divisors (4486861798512).

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

1901432991120 is a wasteful number, since it uses less digits than its factorization.

1901432991120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3881929 (or 3881923 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 42.

The spelling of 1901432991120 in words is "one trillion, nine hundred one billion, four hundred thirty-two million, nine hundred ninety-one thousand, one hundred twenty".