1655203361643 has 20 divisors (see below), whose sum is σ = 2662786796208. Its totient is φ = 1018586683440.

The previous prime is 1655203361611. The next prime is 1655203361677. The reversal of 1655203361643 is 3461633025561.

1655203361643 is a `hidden beast` number, since 1 + 6 + 5 + 5 + 20 + 3 + 3 + 616 + 4 + 3 = 666.

It is not a de Polignac number, because 1655203361643 - 2⁵ = 1655203361611 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1655203361743) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 785945463 + ... + 785947568.

Almost surely, 2^{1655203361643} is an apocalyptic number.

1655203361643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1655203361643 is a deficient number, since it is larger than the sum of its proper divisors (1007583434565).

1655203361643 is a wasteful number, since it uses less digits than its factorization.

1655203361643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571893056 (or 1571893047 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 45.

The spelling of 1655203361643 in words is "one trillion, six hundred fifty-five billion, two hundred three million, three hundred sixty-one thousand, six hundred forty-three".