1257023706057 has 24 divisors (see below), whose sum is σ = 2076081261696. Its totient is φ = 717955007616.

The previous prime is 1257023706023. The next prime is 1257023706077. The reversal of 1257023706057 is 7506073207521.

1257023706057 is a `hidden beast` number, since 1 + 2 + 5 + 7 + 0 + 2 + 37 + 0 + 605 + 7 = 666.

It is not a de Polignac number, because 1257023706057 - 2²² = 1257019511753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1257023706077) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4648768 + ... + 4911729.

It is an arithmetic number, because the mean of its divisors is an integer number (86503385904).

Almost surely, 2^{1257023706057} is an apocalyptic number.

It is an amenable number.

1257023706057 is a deficient number, since it is larger than the sum of its proper divisors (819057555639).

1257023706057 is a wasteful number, since it uses less digits than its factorization.

1257023706057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9562597 (or 9562594 counting only the distinct ones).

The product of its (nonzero) digits is 617400, while the sum is 45.

The spelling of 1257023706057 in words is "one trillion, two hundred fifty-seven billion, twenty-three million, seven hundred six thousand, fifty-seven".