1901653943520 has 192 divisors, whose sum is σ = 6251628418560. Its totient is φ = 484983932928.

The previous prime is 1901653943473. The next prime is 1901653943537. The reversal of 1901653943520 is 253493561091.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1901653943520.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116894427 + ... + 116910693.

It is an arithmetic number, because the mean of its divisors is an integer number (32560564680).

Almost surely, 2^{1901653943520} is an apocalyptic number.

1901653943520 is a gapful number since it is divisible by the number (10) 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 1901653943520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3125814209280).

1901653943520 is an abundant number, since it is smaller than the sum of its proper divisors (4349974475040).

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

1901653943520 is a wasteful number, since it uses less digits than its factorization.

1901653943520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26897 (or 26889 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 48.

The spelling of 1901653943520 in words is "one trillion, nine hundred one billion, six hundred fifty-three million, nine hundred forty-three thousand, five hundred twenty".