1426421633642 has 4 divisors (see below), whose sum is σ = 2139632450466. Its totient is φ = 713210816820.

The previous prime is 1426421633641. The next prime is 1426421633647. The reversal of 1426421633642 is 2463361246241.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 1183115219521 + 243306414121 = 1087711^2 + 493261^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1426421633593 and 1426421633602.

It is not an unprimeable number, because it can be changed into a prime (1426421633641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 356605408409 + ... + 356605408412.

Almost surely, 2^{1426421633642} is an apocalyptic number.

1426421633642 is a deficient number, since it is larger than the sum of its proper divisors (713210816824).

1426421633642 is an equidigital number, since it uses as much as digits as its factorization.

1426421633642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713210816823.

The product of its digits is 995328, while the sum is 44.

Adding to 1426421633642 its reverse (2463361246241), we get a palindrome (3889782879883).

The spelling of 1426421633642 in words is "one trillion, four hundred twenty-six billion, four hundred twenty-one million, six hundred thirty-three thousand, six hundred forty-two".