2651784138 has 12 divisors (see below), whose sum is σ = 5745532338. Its totient is φ = 883928040.

The previous prime is 2651784119. The next prime is 2651784169. The reversal of 2651784138 is 8314871562.

2651784138 is a `hidden beast` number, since 2 + 65 + 178 + 413 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2289909609 + 361874529 = 47853^2 + 19023^2 .

It is a super-2 number, since 2×2651784138² = 14063918229096806088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2651784093 and 2651784102.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73660653 + ... + 73660688.

Almost surely, 2^2651784138 is an apocalyptic number.

2651784138 is an abundant number, since it is smaller than the sum of its proper divisors (3093748200).

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

2651784138 is a wasteful number, since it uses less digits than its factorization.

2651784138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147321349 (or 147321346 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 2651784138 is about 51495.4768693329. The cubic root of 2651784138 is about 1384.1379923693.

The spelling of 2651784138 in words is "two billion, six hundred fifty-one million, seven hundred eighty-four thousand, one hundred thirty-eight".