1655615655 has 48 divisors (see below), whose sum is σ = 3031966080. Its totient is φ = 834376704.

The previous prime is 1655615651. The next prime is 1655615657. The reversal of 1655615655 is 5565165561.

It is not a de Polignac number, because 1655615655 - 2² = 1655615651 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1655615655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655615651) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47839 + ... + 74831.

It is an arithmetic number, because the mean of its divisors is an integer number (63165960).

Almost surely, 2^1655615655 is an apocalyptic number.

1655615655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1655615655 is a deficient number, since it is larger than the sum of its proper divisors (1376350425).

1655615655 is a wasteful number, since it uses less digits than its factorization.

1655615655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27080 (or 27077 counting only the distinct ones).

The product of its digits is 675000, while the sum is 45.

The square root of 1655615655 is about 40689.2572431594. The cubic root of 1655615655 is about 1183.0048036386.

The spelling of 1655615655 in words is "one billion, six hundred fifty-five million, six hundred fifteen thousand, six hundred fifty-five".