1264027915379 has 4 divisors (see below), whose sum is σ = 1264339486584. Its totient is φ = 1263716344176.

The previous prime is 1264027915343. The next prime is 1264027915387. The reversal of 1264027915379 is 9735197204621.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1264027915379 - 2¹² = 1264027911283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264027915309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155779517 + ... + 155787630.

It is an arithmetic number, because the mean of its divisors is an integer number (316084871646).

Almost surely, 2^{1264027915379} is an apocalyptic number.

1264027915379 is a deficient number, since it is larger than the sum of its proper divisors (311571205).

1264027915379 is an equidigital number, since it uses as much as digits as its factorization.

1264027915379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311571204.

The product of its (nonzero) digits is 5715360, while the sum is 56.

The spelling of 1264027915379 in words is "one trillion, two hundred sixty-four billion, twenty-seven million, nine hundred fifteen thousand, three hundred seventy-nine".