1605155655 has 16 divisors (see below), whose sum is σ = 2656810080. Its totient is φ = 826562688.

The previous prime is 1605155627. The next prime is 1605155683. The reversal of 1605155655 is 5565515061.

It is an interprime number because it is at equal distance from previous prime (1605155627) and next prime (1605155683).

It is not a de Polignac number, because 1605155655 - 2⁹ = 1605155143 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1844572 + ... + 1845441.

It is an arithmetic number, because the mean of its divisors is an integer number (166050630).

Almost surely, 2^1605155655 is an apocalyptic number.

1605155655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1605155655 is a deficient number, since it is larger than the sum of its proper divisors (1051654425).

1605155655 is a wasteful number, since it uses less digits than its factorization.

1605155655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3690050.

The product of its (nonzero) digits is 112500, while the sum is 39.

The square root of 1605155655 is about 40064.3938553923. The cubic root of 1605155655 is about 1170.8620172330.

The spelling of 1605155655 in words is "one billion, six hundred five million, one hundred fifty-five thousand, six hundred fifty-five".