1264140644245 has 16 divisors (see below), whose sum is σ = 1528065356400. Its totient is φ = 1003937665024.

The previous prime is 1264140644237. The next prime is 1264140644267. The reversal of 1264140644245 is 5424460414621.

It can be written as a sum of positive squares in 8 ways, for example, as 99211140484 + 1164929503761 = 314978^2 + 1079319^2 .

It is a cyclic number.

It is not a de Polignac number, because 1264140644245 - 2³ = 1264140644237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 986902 + ... + 1871431.

It is an arithmetic number, because the mean of its divisors is an integer number (95504084775).

Almost surely, 2^{1264140644245} is an apocalyptic number.

It is an amenable number.

1264140644245 is a deficient number, since it is larger than the sum of its proper divisors (263924712155).

1264140644245 is a wasteful number, since it uses less digits than its factorization.

1264140644245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858984.

The product of its (nonzero) digits is 737280, while the sum is 43.

The spelling of 1264140644245 in words is "one trillion, two hundred sixty-four billion, one hundred forty million, six hundred forty-four thousand, two hundred forty-five".