145691073025 has 27 divisors (see below), whose sum is σ = 182770810569. Its totient is φ = 115204711680.

The previous prime is 145691073007. The next prime is 145691073029. The reversal of 145691073025 is 520370196541.

The square root of 145691073025 is 381695.

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

145691073025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5356922481 + 140334150544 = 73191^2 + 374612^2 .

It is not a de Polignac number, because 145691073025 - 2¹³ = 145691064833 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145691073029) 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, 185121682 + ... + 185122468.

Almost surely, 2^145691073025 is an apocalyptic number.

145691073025 is the 381695-th square number.

145691073025 is the 190848-th centered octagonal number.

It is an amenable number.

145691073025 is a deficient number, since it is larger than the sum of its proper divisors (37079737544).

145691073025 is an frugal number, since it uses more digits than its factorization.

145691073025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778 (or 889 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 145691073025 in words is "one hundred forty-five billion, six hundred ninety-one million, seventy-three thousand, twenty-five".