1204257649728 has 56 divisors (see below), whose sum is σ = 3641445754432. Its totient is φ = 344073613824.

The previous prime is 1204257649723. The next prime is 1204257649741. The reversal of 1204257649728 is 8279467524021.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (1204257649723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 448011175 + ... + 448013862.

Almost surely, 2^{1204257649728} is an apocalyptic number.

It is an amenable number.

1204257649728 is an abundant number, since it is smaller than the sum of its proper divisors (2437188104704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1204257649728 is an equidigital number, since it uses as much as digits as its factorization.

1204257649728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896025059 (or 896025049 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 57.

The spelling of 1204257649728 in words is "one trillion, two hundred four billion, two hundred fifty-seven million, six hundred forty-nine thousand, seven hundred twenty-eight".