1374320465561 has 8 divisors (see below), whose sum is σ = 1375279551624. Its totient is φ = 1373361690240.

The previous prime is 1374320465503. The next prime is 1374320465641. The reversal of 1374320465561 is 1655640234731.

It can be written as a sum of positive squares in 4 ways, for example, as 358538685961 + 1015781779600 = 598781^2 + 1007860^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1374320465561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1374320465461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9149315 + ... + 9298311.

It is an arithmetic number, because the mean of its divisors is an integer number (171909943953).

Almost surely, 2^{1374320465561} is an apocalyptic number.

It is an amenable number.

1374320465561 is a deficient number, since it is larger than the sum of its proper divisors (959086063).

1374320465561 is a wasteful number, since it uses less digits than its factorization.

1374320465561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155371.

The product of its (nonzero) digits is 1814400, while the sum is 47.

The spelling of 1374320465561 in words is "one trillion, three hundred seventy-four billion, three hundred twenty million, four hundred sixty-five thousand, five hundred sixty-one".