1655354772 has 48 divisors (see below), whose sum is σ = 4309536000. Its totient is φ = 549486720.

The previous prime is 1655354749. The next prime is 1655354773. The reversal of 1655354772 is 2774535561.

It is a happy number.

1655354772 is a `hidden beast` number, since 1 + 6 + 5 + 535 + 47 + 72 = 666.

It is a super-3 number, since 3×1655354772³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655354773) 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, 5772 + ... + 57827.

It is an arithmetic number, because the mean of its divisors is an integer number (89782000).

Almost surely, 2^1655354772 is an apocalyptic number.

1655354772 is a gapful number since it is divisible by the number (12) 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 1655354772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2154768000).

1655354772 is an abundant number, since it is smaller than the sum of its proper divisors (2654181228).

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

1655354772 is a wasteful number, since it uses less digits than its factorization.

1655354772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63853 (or 63845 counting only the distinct ones).

The product of its digits is 882000, while the sum is 45.

The square root of 1655354772 is about 40686.0513198320. The cubic root of 1655354772 is about 1182.9426631989.

The spelling of 1655354772 in words is "one billion, six hundred fifty-five million, three hundred fifty-four thousand, seven hundred seventy-two".