2154987768 has 16 divisors (see below), whose sum is σ = 5387469480. Its totient is φ = 718329248.

The previous prime is 2154987761. The next prime is 2154987773. The reversal of 2154987768 is 8677894512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154987761) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 44895555 + ... + 44895602.

Almost surely, 2^2154987768 is an apocalyptic number.

It is an amenable number.

2154987768 is an abundant number, since it is smaller than the sum of its proper divisors (3232481712).

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

2154987768 is a wasteful number, since it uses less digits than its factorization.

2154987768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89791166 (or 89791162 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 57.

The square root of 2154987768 is about 46421.8458056118. The cubic root of 2154987768 is about 1291.6601760691.

The spelling of 2154987768 in words is "two billion, one hundred fifty-four million, nine hundred eighty-seven thousand, seven hundred sixty-eight".