2131626678 has 16 divisors (see below), whose sum is σ = 4266971136. Its totient is φ = 709922600.

The previous prime is 2131626677. The next prime is 2131626697. The reversal of 2131626678 is 8766261312.

It is a super-2 number, since 2×2131626678² = 9087664588722631368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131626671) 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 7 ways as a sum of consecutive naturals, for example, 147426 + ... + 161237.

It is an arithmetic number, because the mean of its divisors is an integer number (266685696).

Almost surely, 2^2131626678 is an apocalyptic number.

2131626678 is an abundant number, since it is smaller than the sum of its proper divisors (2135344458).

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

2131626678 is a wasteful number, since it uses less digits than its factorization.

2131626678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309819.

The product of its digits is 145152, while the sum is 42.

The square root of 2131626678 is about 46169.5427527716. The cubic root of 2131626678 is about 1286.9758050571.

The spelling of 2131626678 in words is "two billion, one hundred thirty-one million, six hundred twenty-six thousand, six hundred seventy-eight".