2155749748 has 12 divisors (see below), whose sum is σ = 3773527072. Its totient is φ = 1077599160.

The previous prime is 2155749737. The next prime is 2155749751. The reversal of 2155749748 is 8479475512.

It is a junction number, because it is equal to n+sod(n) for n = 2155749695 and 2155749704.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50808 + ... + 83023.

Almost surely, 2^2155749748 is an apocalyptic number.

It is an amenable number.

2155749748 is a deficient number, since it is larger than the sum of its proper divisors (1617777324).

2155749748 is a wasteful number, since it uses less digits than its factorization.

2155749748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137862 (or 137860 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 52.

The square root of 2155749748 is about 46430.0522075950. The cubic root of 2155749748 is about 1291.8123970787.

The spelling of 2155749748 in words is "two billion, one hundred fifty-five million, seven hundred forty-nine thousand, seven hundred forty-eight".