1655551672 has 16 divisors (see below), whose sum is σ = 3162729240. Its totient is φ = 812157216.

The previous prime is 1655551657. The next prime is 1655551673. The reversal of 1655551672 is 2761555561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655551673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1951878 + ... + 1952725.

Almost surely, 2^1655551672 is an apocalyptic number.

It is an amenable number.

1655551672 is a deficient number, since it is larger than the sum of its proper divisors (1507177568).

1655551672 is a wasteful number, since it uses less digits than its factorization.

1655551672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3904662 (or 3904658 counting only the distinct ones).

The product of its digits is 315000, while the sum is 43.

The square root of 1655551672 is about 40688.4709960942. The cubic root of 1655551672 is about 1182.9895639560.

The spelling of 1655551672 in words is "one billion, six hundred fifty-five million, five hundred fifty-one thousand, six hundred seventy-two".