1655496864 has 144 divisors (see below), whose sum is σ = 5396751360. Its totient is φ = 471559680.

The previous prime is 1655496863. The next prime is 1655496877. The reversal of 1655496864 is 4686945561.

1655496864 is a `hidden beast` number, since 1 + 6 + 554 + 9 + 6 + 86 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 1655496864.

It is not an unprimeable number, because it can be changed into a prime (1655496863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 783169 + ... + 785279.

It is an arithmetic number, because the mean of its divisors is an integer number (37477440).

Almost surely, 2^1655496864 is an apocalyptic number.

1655496864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1655496864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2698375680).

1655496864 is an abundant number, since it is smaller than the sum of its proper divisors (3741254496).

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

1655496864 is a wasteful number, since it uses less digits than its factorization.

1655496864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523 (or 2512 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The square root of 1655496864 is about 40687.7974827835. The cubic root of 1655496864 is about 1182.9765092929.

The spelling of 1655496864 in words is "one billion, six hundred fifty-five million, four hundred ninety-six thousand, eight hundred sixty-four".