1655098661 has 4 divisors (see below), whose sum is σ = 1662024000. Its totient is φ = 1648173324.

The previous prime is 1655098651. The next prime is 1655098663. The reversal of 1655098661 is 1668905561.

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 1655098661 - 2²⁶ = 1587989797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655098663) 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, 3462311 + ... + 3462788.

It is an arithmetic number, because the mean of its divisors is an integer number (415506000).

Almost surely, 2^1655098661 is an apocalyptic number.

It is an amenable number.

1655098661 is a deficient number, since it is larger than the sum of its proper divisors (6925339).

1655098661 is an equidigital number, since it uses as much as digits as its factorization.

1655098661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6925338.

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 1655098661 is about 40682.9037926252. The cubic root of 1655098661 is about 1182.8816530639.

The spelling of 1655098661 in words is "one billion, six hundred fifty-five million, ninety-eight thousand, six hundred sixty-one".