1257974312889 has 48 divisors (see below), whose sum is σ = 2036258040960. Its totient is φ = 687493255680.

The previous prime is 1257974312867. The next prime is 1257974312891. The reversal of 1257974312889 is 9882134797521.

It is not a de Polignac number, because 1257974312889 - 2⁷ = 1257974312761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1257974312389) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29356099 + ... + 29398919.

It is an arithmetic number, because the mean of its divisors is an integer number (42422042520).

Almost surely, 2^{1257974312889} is an apocalyptic number.

It is an amenable number.

1257974312889 is a deficient number, since it is larger than the sum of its proper divisors (778283728071).

1257974312889 is a wasteful number, since it uses less digits than its factorization.

1257974312889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51550 (or 51543 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 66.

The spelling of 1257974312889 in words is "one trillion, two hundred fifty-seven billion, nine hundred seventy-four million, three hundred twelve thousand, eight hundred eighty-nine".