1655550111601 has 4 divisors (see below), whose sum is σ = 1655636325952. Its totient is φ = 1655463897252.

The previous prime is 1655550111571. The next prime is 1655550111637. The reversal of 1655550111601 is 1061110555561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1655550111601 - 2¹³ = 1655550103409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1655550111661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43078365 + ... + 43116778.

It is an arithmetic number, because the mean of its divisors is an integer number (413909081488).

Almost surely, 2^{1655550111601} is an apocalyptic number.

It is an amenable number.

1655550111601 is a deficient number, since it is larger than the sum of its proper divisors (86214351).

1655550111601 is an equidigital number, since it uses as much as digits as its factorization.

1655550111601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86214350.

The product of its (nonzero) digits is 22500, while the sum is 37.

The spelling of 1655550111601 in words is "one trillion, six hundred fifty-five billion, five hundred fifty million, one hundred eleven thousand, six hundred one".