1447991607925 has 24 divisors (see below), whose sum is σ = 1801512095400. Its totient is φ = 1154525518080.

The previous prime is 1447991607899. The next prime is 1447991607961. The reversal of 1447991607925 is 5297061997441.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 97408282609 + 1350583325316 = 312103^2 + 1162146^2 .

It is not a de Polignac number, because 1447991607925 - 2⁵ = 1447991607893 is a prime.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12138471 + ... + 12257179.

It is an arithmetic number, because the mean of its divisors is an integer number (75063003975).

Almost surely, 2^{1447991607925} is an apocalyptic number.

It is an amenable number.

1447991607925 is a deficient number, since it is larger than the sum of its proper divisors (353520487475).

1447991607925 is a wasteful number, since it uses less digits than its factorization.

1447991607925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120345 (or 120340 counting only the distinct ones).

The product of its (nonzero) digits is 34292160, while the sum is 64.

The spelling of 1447991607925 in words is "one trillion, four hundred forty-seven billion, nine hundred ninety-one million, six hundred seven thousand, nine hundred twenty-five".