1655119890 has 96 divisors (see below), whose sum is σ = 4436752320. Its totient is φ = 427773312.

The previous prime is 1655119889. The next prime is 1655119901. The reversal of 1655119890 is 989115561.

1655119890 is a `hidden beast` number, since 1 + 6 + 551 + 1 + 9 + 8 + 90 = 666.

It is a super-2 number, since 2×1655119890² = 5478843700547224200, which contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1021501 + ... + 1023119.

It is an arithmetic number, because the mean of its divisors is an integer number (46216170).

Almost surely, 2^1655119890 is an apocalyptic number.

1655119890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1655119890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2218376160).

1655119890 is an abundant number, since it is smaller than the sum of its proper divisors (2781632430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1655119890 is a wasteful number, since it uses less digits than its factorization.

1655119890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976 (or 1973 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 45.

The square root of 1655119890 is about 40683.1646999100. The cubic root of 1655119890 is about 1182.8867104235.

The spelling of 1655119890 in words is "one billion, six hundred fifty-five million, one hundred nineteen thousand, eight hundred ninety".