1901734773156 has 135 divisors (see below), whose sum is σ = 5198621591163. Its totient is φ = 606168185040.

The previous prime is 1901734773119. The next prime is 1901734773157. The reversal of 1901734773156 is 6513774371091.

It is a happy number.

The square root of 1901734773156 is 1379034.

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

1901734773156 is a `hidden beast` number, since 1 + 9 + 0 + 17 + 3 + 477 + 3 + 156 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1901734773157) by changing a digit.

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 44 ways as a sum of consecutive naturals, for example, 570918411 + ... + 570921741.

Almost surely, 2^{1901734773156} is an apocalyptic number.

1901734773156 is the 1379034-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1901734773156

1901734773156 is an abundant number, since it is smaller than the sum of its proper divisors (3296886818007).

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

1901734773156 is an frugal number, since it uses more digits than its factorization.

1901734773156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6724 (or 3359 counting only the distinct ones).

The product of its (nonzero) digits is 3333960, while the sum is 54.

The spelling of 1901734773156 in words is "one trillion, nine hundred one billion, seven hundred thirty-four million, seven hundred seventy-three thousand, one hundred fifty-six".