1264950647049 has 4 divisors (see below), whose sum is σ = 1686600862736. Its totient is φ = 843300431364.

The previous prime is 1264950647039. The next prime is 1264950647057. The reversal of 1264950647049 is 9407460594621.

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 not a de Polignac number, because 1264950647049 - 2⁸ = 1264950646793 is a prime.

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 1264950647049.

It is not an unprimeable number, because it can be changed into a prime (1264950647039) 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, 210825107839 + ... + 210825107844.

It is an arithmetic number, because the mean of its divisors is an integer number (421650215684).

Almost surely, 2^{1264950647049} is an apocalyptic number.

It is an amenable number.

1264950647049 is a deficient number, since it is larger than the sum of its proper divisors (421650215687).

1264950647049 is an equidigital number, since it uses as much as digits as its factorization.

1264950647049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421650215686.

The product of its (nonzero) digits is 13063680, while the sum is 57.

The spelling of 1264950647049 in words is "one trillion, two hundred sixty-four billion, nine hundred fifty million, six hundred forty-seven thousand, forty-nine".