1257445166745 has 8 divisors (see below), whose sum is σ = 2011912266816. Its totient is φ = 670637422256.

The previous prime is 1257445166737. The next prime is 1257445166771. The reversal of 1257445166745 is 5476615447521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1257445166745 - 2³ = 1257445166737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41914838877 + ... + 41914838906.

It is an arithmetic number, because the mean of its divisors is an integer number (251489033352).

Almost surely, 2^{1257445166745} is an apocalyptic number.

1257445166745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1257445166745 is a deficient number, since it is larger than the sum of its proper divisors (754467100071).

1257445166745 is an equidigital number, since it uses as much as digits as its factorization.

1257445166745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83829677791.

The product of its digits is 28224000, while the sum is 57.

The spelling of 1257445166745 in words is "one trillion, two hundred fifty-seven billion, four hundred forty-five million, one hundred sixty-six thousand, seven hundred forty-five".