1427063778557 has 4 divisors (see below), whose sum is σ = 1428637168416. Its totient is φ = 1425490388700.

The previous prime is 1427063778541. The next prime is 1427063778587. The reversal of 1427063778557 is 7558773607241.

It is a happy number.

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 1427063778557 - 2⁴ = 1427063778541 is a prime.

It is a super-2 number, since 2×1427063778557² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1427063778557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1427063778587) 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, 786693569 + ... + 786695382.

It is an arithmetic number, because the mean of its divisors is an integer number (357159292104).

Almost surely, 2^{1427063778557} is an apocalyptic number.

It is an amenable number.

1427063778557 is a deficient number, since it is larger than the sum of its proper divisors (1573389859).

1427063778557 is an equidigital number, since it uses as much as digits as its factorization.

1427063778557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573389858.

The product of its (nonzero) digits is 69148800, while the sum is 62.

The spelling of 1427063778557 in words is "one trillion, four hundred twenty-seven billion, sixty-three million, seven hundred seventy-eight thousand, five hundred fifty-seven".