1945625625 has 30 divisors (see below), whose sum is σ = 3511821170. Its totient is φ = 1037664000.

The previous prime is 1945625609. The next prime is 1945625749. The reversal of 1945625625 is 5265265491.

1945625625 is a `hidden beast` number, since 19 + 4 + 5 + 6 + 2 + 5 + 625 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 790509456 + 1155116169 = 28116^2 + 33987^2 .

It is not a de Polignac number, because 1945625625 - 2⁴ = 1945625609 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 29 ways as a sum of consecutive naturals, for example, 167320 + ... + 178569.

Almost surely, 2^1945625625 is an apocalyptic number.

1945625625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1945625625 is a deficient number, since it is larger than the sum of its proper divisors (1566195545).

1945625625 is an equidigital number, since it uses as much as digits as its factorization.

1945625625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345915 (or 345897 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The square root of 1945625625 is about 44109.2464796215. The cubic root of 1945625625 is about 1248.3980812955.

The spelling of 1945625625 in words is "one billion, nine hundred forty-five million, six hundred twenty-five thousand, six hundred twenty-five".