1900788873481 has 3 divisors (see below), whose sum is σ = 1900790252173. Its totient is φ = 1900787494790.

The previous prime is 1900788873469. The next prime is 1900788873497. The reversal of 1900788873481 is 1843788870091.

The square root of 1900788873481 is 1378691.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1900788873481 - 2¹⁹ = 1900788349193 is a prime.

It is a super-2 number, since 2×1900788873481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1900788871481) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 689346 + ... + 2068036.

Almost surely, 2^{1900788873481} is an apocalyptic number.

1900788873481 is the 1378691-st square number.

1900788873481 is the 689346-th centered octagonal number.

It is an amenable number.

1900788873481 is a deficient number, since it is larger than the sum of its proper divisors (1378692).

1900788873481 is an frugal number, since it uses more digits than its factorization.

1900788873481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2757382 (or 1378691 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 64.

Multiplying 1900788873481 by its sum of digits (64), we get a square (121650487902784 = 11029528²).

The spelling of 1900788873481 in words is "one trillion, nine hundred billion, seven hundred eighty-eight million, eight hundred seventy-three thousand, four hundred eighty-one".