1943115455551 has 8 divisors (see below), whose sum is σ = 1988435232000. Its totient is φ = 1897961383128.

The previous prime is 1943115455543. The next prime is 1943115455573. The reversal of 1943115455551 is 1555545113491.

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

It is a cyclic number.

It is not a de Polignac number, because 1943115455551 - 2³ = 1943115455543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1943115455495 and 1943115455504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1943115455581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41402281 + ... + 41449186.

It is an arithmetic number, because the mean of its divisors is an integer number (248554404000).

Almost surely, 2^{1943115455551} is an apocalyptic number.

1943115455551 is a deficient number, since it is larger than the sum of its proper divisors (45319776449).

1943115455551 is an equidigital number, since it uses as much as digits as its factorization.

1943115455551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82852013.

The product of its digits is 1350000, while the sum is 49.

The spelling of 1943115455551 in words is "one trillion, nine hundred forty-three billion, one hundred fifteen million, four hundred fifty-five thousand, five hundred fifty-one".