1655363401651 has 4 divisors (see below), whose sum is σ = 1655366133352. Its totient is φ = 1655360669952.

The previous prime is 1655363401501. The next prime is 1655363401667. The reversal of 1655363401651 is 1561043635561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1655363401651 - 2¹¹ = 1655363399603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1655363401451) 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 3 ways as a sum of consecutive naturals, for example, 4761 + ... + 1819546.

It is an arithmetic number, because the mean of its divisors is an integer number (413841533338).

Almost surely, 2^{1655363401651} is an apocalyptic number.

1655363401651 is a deficient number, since it is larger than the sum of its proper divisors (2731701).

1655363401651 is an equidigital number, since it uses as much as digits as its factorization.

1655363401651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2731700.

The product of its (nonzero) digits is 972000, while the sum is 46.

The spelling of 1655363401651 in words is "one trillion, six hundred fifty-five billion, three hundred sixty-three million, four hundred one thousand, six hundred fifty-one".