1361640734943 has 8 divisors (see below), whose sum is σ = 1815667195056. Its totient is φ = 907687382400.

The previous prime is 1361640734869. The next prime is 1361640734969. The reversal of 1361640734943 is 3494370461631.

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

It is not a de Polignac number, because 1361640734943 - 2¹⁷ = 1361640603871 is a prime.

It is a super-2 number, since 2×1361640734943² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361640736943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18233418 + ... + 18307943.

It is an arithmetic number, because the mean of its divisors is an integer number (226958399382).

Almost surely, 2^{1361640734943} is an apocalyptic number.

1361640734943 is a deficient number, since it is larger than the sum of its proper divisors (454026460113).

1361640734943 is a wasteful number, since it uses less digits than its factorization.

1361640734943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36553785.

The product of its (nonzero) digits is 3919104, while the sum is 51.

The spelling of 1361640734943 in words is "one trillion, three hundred sixty-one billion, six hundred forty million, seven hundred thirty-four thousand, nine hundred forty-three".