1397307521577 has 32 divisors (see below), whose sum is σ = 2036932531200. Its totient is φ = 844984953920.

The previous prime is 1397307521573. The next prime is 1397307521591. The reversal of 1397307521577 is 7751257037931.

It is a cyclic number.

It is not a de Polignac number, because 1397307521577 - 2² = 1397307521573 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1397307521573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144389863 + ... + 144399539.

It is an arithmetic number, because the mean of its divisors is an integer number (63654141600).

Almost surely, 2^{1397307521577} is an apocalyptic number.

It is an amenable number.

1397307521577 is a deficient number, since it is larger than the sum of its proper divisors (639625009623).

1397307521577 is a wasteful number, since it uses less digits than its factorization.

1397307521577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18893.

The product of its (nonzero) digits is 9724050, while the sum is 57.

The spelling of 1397307521577 in words is "one trillion, three hundred ninety-seven billion, three hundred seven million, five hundred twenty-one thousand, five hundred seventy-seven".