2149661776 has 10 divisors (see below), whose sum is σ = 4164969722. Its totient is φ = 1074830880.

The previous prime is 2149661699. The next prime is 2149661783. The reversal of 2149661776 is 6771669412.

It can be written as a sum of positive squares in only one way, i.e., 1757621776 + 392040000 = 41924^2 + 19800^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67176915 + ... + 67176946.

Almost surely, 2^2149661776 is an apocalyptic number.

It is an amenable number.

2149661776 is a deficient number, since it is larger than the sum of its proper divisors (2015307946).

2149661776 is a wasteful number, since it uses less digits than its factorization.

2149661776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134353869 (or 134353863 counting only the distinct ones).

The product of its digits is 762048, while the sum is 49.

The square root of 2149661776 is about 46364.4451708418. The cubic root of 2149661776 is about 1290.5951975647.

The spelling of 2149661776 in words is "two billion, one hundred forty-nine million, six hundred sixty-one thousand, seven hundred seventy-six".