1934021457481 has 27 divisors (see below), whose sum is σ = 2021354951733. Its totient is φ = 1850397816960.

The previous prime is 1934021457461. The next prime is 1934021457491. The reversal of 1934021457481 is 1847541204391.

The square root of 1934021457481 is 1390691.

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

It can be written as a sum of positive squares in 4 ways, for example, as 410228721081 + 1523792736400 = 640491^2 + 1234420^2 .

It is not a de Polignac number, because 1934021457481 - 2¹³ = 1934021449289 is a prime.

It is a super-2 number, since 2×1934021457481² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1934021457421) 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 26 ways as a sum of consecutive naturals, for example, 4871590375 + ... + 4871590771.

Almost surely, 2^{1934021457481} is an apocalyptic number.

1934021457481 is the 1390691-st square number.

1934021457481 is the 695346-th centered octagonal number.

It is an amenable number.

1934021457481 is a deficient number, since it is larger than the sum of its proper divisors (87333494252).

1934021457481 is an frugal number, since it uses more digits than its factorization.

1934021457481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082 (or 541 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

Multiplying 1934021457481 by its sum of digits (49), we get a square (94767051416569 = 9734837²).

The spelling of 1934021457481 in words is "one trillion, nine hundred thirty-four billion, twenty-one million, four hundred fifty-seven thousand, four hundred eighty-one".