1257547307568 has 40 divisors (see below), whose sum is σ = 3248704504128. Its totient is φ = 419177193792.

The previous prime is 1257547307557. The next prime is 1257547307573. The reversal of 1257547307568 is 8657037457521.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6557655 + ... + 6746697.

Almost surely, 2^{1257547307568} is an apocalyptic number.

It is an amenable number.

1257547307568 is an abundant number, since it is smaller than the sum of its proper divisors (1991157196560).

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

1257547307568 is a wasteful number, since it uses less digits than its factorization.

1257547307568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327641 (or 327635 counting only the distinct ones).

The product of its (nonzero) digits is 49392000, while the sum is 60.

The spelling of 1257547307568 in words is "one trillion, two hundred fifty-seven billion, five hundred forty-seven million, three hundred seven thousand, five hundred sixty-eight".