1655146993 has 4 divisors (see below), whose sum is σ = 1655869860. Its totient is φ = 1654424128.

The previous prime is 1655146967. The next prime is 1655147027. The reversal of 1655146993 is 3996415561.

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

It can be written as a sum of positive squares in 2 ways, for example, as 668119104 + 987027889 = 25848^2 + 31417^2 .

It is a cyclic number.

It is not a de Polignac number, because 1655146993 - 2²⁵ = 1621592561 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1655146903) 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, 357988 + ... + 362581.

It is an arithmetic number, because the mean of its divisors is an integer number (413967465).

Almost surely, 2^1655146993 is an apocalyptic number.

It is an amenable number.

1655146993 is a deficient number, since it is larger than the sum of its proper divisors (722867).

1655146993 is an equidigital number, since it uses as much as digits as its factorization.

1655146993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722866.

The product of its digits is 874800, while the sum is 49.

The square root of 1655146993 is about 40683.4977970184. The cubic root of 1655146993 is about 1182.8931670763.

The spelling of 1655146993 in words is "one billion, six hundred fifty-five million, one hundred forty-six thousand, nine hundred ninety-three".