1655665459 has 16 divisors (see below), whose sum is σ = 1933624000. Its totient is φ = 1417070592.

The previous prime is 1655665447. The next prime is 1655665469. The reversal of 1655665459 is 9545665561.

It is not a de Polignac number, because 1655665459 - 2¹¹ = 1655663411 is a prime.

It is a super-2 number, since 2×1655665459² = 5482456224251361362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1655665409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260629 + ... + 266905.

It is an arithmetic number, because the mean of its divisors is an integer number (120851500).

Almost surely, 2^1655665459 is an apocalyptic number.

1655665459 is a deficient number, since it is larger than the sum of its proper divisors (277958541).

1655665459 is an frugal number, since it uses more digits than its factorization.

1655665459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7067 (or 7053 counting only the distinct ones).

The product of its digits is 4860000, while the sum is 52.

The square root of 1655665459 is about 40689.8692428472. The cubic root of 1655665459 is about 1183.0166658483.

The spelling of 1655665459 in words is "one billion, six hundred fifty-five million, six hundred sixty-five thousand, four hundred fifty-nine".