1426038556381 has 4 divisors (see below), whose sum is σ = 1427710349212. Its totient is φ = 1424366763552.

The previous prime is 1426038556363. The next prime is 1426038556387. The reversal of 1426038556381 is 1836558306241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 866072196900 + 559966359481 = 930630^2 + 748309^2 .

It is a cyclic number.

It is not a de Polignac number, because 1426038556381 - 2²⁹ = 1425501685469 is a prime.

It is a super-2 number, since 2×1426038556381² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1426038556387) 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, 835895136 + ... + 835896841.

It is an arithmetic number, because the mean of its divisors is an integer number (356927587303).

Almost surely, 2^{1426038556381} is an apocalyptic number.

It is an amenable number.

1426038556381 is a deficient number, since it is larger than the sum of its proper divisors (1671792831).

1426038556381 is an equidigital number, since it uses as much as digits as its factorization.

1426038556381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671792830.

The product of its (nonzero) digits is 4147200, while the sum is 52.

The spelling of 1426038556381 in words is "one trillion, four hundred twenty-six billion, thirty-eight million, five hundred fifty-six thousand, three hundred eighty-one".