1361447554440 has 128 divisors (see below), whose sum is σ = 4132051781760. Its totient is φ = 358827577344.

The previous prime is 1361447554409. The next prime is 1361447554447. The reversal of 1361447554440 is 444557441631.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1361447554440.

It is not an unprimeable number, because it can be changed into a prime (1361447554447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5437282 + ... + 5682158.

It is an arithmetic number, because the mean of its divisors is an integer number (32281654545).

Almost surely, 2^{1361447554440} is an apocalyptic number.

1361447554440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1361447554440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2066025890880).

1361447554440 is an abundant number, since it is smaller than the sum of its proper divisors (2770604227320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1361447554440 is a wasteful number, since it uses less digits than its factorization.

1361447554440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245431 (or 245427 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 48.

The spelling of 1361447554440 in words is "one trillion, three hundred sixty-one billion, four hundred forty-seven million, five hundred fifty-four thousand, four hundred forty".