1279621068454 has 4 divisors (see below), whose sum is σ = 1919431602684. Its totient is φ = 639810534226.

The previous prime is 1279621068403. The next prime is 1279621068461. The reversal of 1279621068454 is 4548601269721.

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

It is a junction number, because it is equal to n+sod(n) for n = 1279621068395 and 1279621068404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319905267112 + ... + 319905267115.

It is an arithmetic number, because the mean of its divisors is an integer number (479857900671).

Almost surely, 2^{1279621068454} is an apocalyptic number.

1279621068454 is a deficient number, since it is larger than the sum of its proper divisors (639810534230).

1279621068454 is an equidigital number, since it uses as much as digits as its factorization.

1279621068454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639810534229.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 1279621068454 in words is "one trillion, two hundred seventy-nine billion, six hundred twenty-one million, sixty-eight thousand, four hundred fifty-four".