1361264556646 has 4 divisors (see below), whose sum is σ = 2041896834972. Its totient is φ = 680632278322.

The previous prime is 1361264556623. The next prime is 1361264556647. The reversal of 1361264556646 is 6466554621631.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361264556647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340316139160 + ... + 340316139163.

It is an arithmetic number, because the mean of its divisors is an integer number (510474208743).

Almost surely, 2^{1361264556646} is an apocalyptic number.

1361264556646 is a deficient number, since it is larger than the sum of its proper divisors (680632278326).

1361264556646 is an equidigital number, since it uses as much as digits as its factorization.

1361264556646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680632278325.

The product of its digits is 18662400, while the sum is 55.

The spelling of 1361264556646 in words is "one trillion, three hundred sixty-one billion, two hundred sixty-four million, five hundred fifty-six thousand, six hundred forty-six".