1745276145921 has 405 divisors, whose sum is σ = 3492880211457. Its totient is φ = 838944358560.

The previous prime is 1745276145829. The next prime is 1745276145923. The reversal of 1745276145921 is 1295416725471.

The square root of 1745276145921 is 1321089.

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

1745276145921 is a `hidden beast` number, since 1 + 7 + 4 + 527 + 61 + 4 + 59 + 2 + 1 = 666.

It is not a de Polignac number, because 1745276145921 - 2⁹ = 1745276145409 is a prime.

Its product of digits (4233600) is a multiple of the sum of its prime factors (180).

It is not an unprimeable number, because it can be changed into a prime (1745276145923) by changing a digit.

It is a polite number, since it can be written in 404 ways as a sum of consecutive naturals, for example, 40587817326 + ... + 40587817368.

Almost surely, 2^{1745276145921} is an apocalyptic number.

1745276145921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1745276145921 is the 1321089-th square number.

1745276145921 is the 660545-th centered octagonal number.

It is an amenable number.

1745276145921 is an abundant number, since it is smaller than the sum of its proper divisors (1747604065536).

1745276145921 is an equidigital number, since it uses as much as digits as its factorization.

1745276145921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 83 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 54.

The spelling of 1745276145921 in words is "one trillion, seven hundred forty-five billion, two hundred seventy-six million, one hundred forty-five thousand, nine hundred twenty-one".