1427980409857 has 4 divisors (see below), whose sum is σ = 1428129993136. Its totient is φ = 1427830826580.

The previous prime is 1427980409827. The next prime is 1427980409873. The reversal of 1427980409857 is 7589040897241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1427980409857 - 2¹⁹ = 1427979885569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1427980409827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74777319 + ... + 74796412.

It is an arithmetic number, because the mean of its divisors is an integer number (357032498284).

Almost surely, 2^{1427980409857} is an apocalyptic number.

It is an amenable number.

1427980409857 is a deficient number, since it is larger than the sum of its proper divisors (149583279).

1427980409857 is an equidigital number, since it uses as much as digits as its factorization.

1427980409857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149583278.

The product of its (nonzero) digits is 40642560, while the sum is 64.

The spelling of 1427980409857 in words is "one trillion, four hundred twenty-seven billion, nine hundred eighty million, four hundred nine thousand, eight hundred fifty-seven".