126018821380 has 24 divisors (see below), whose sum is σ = 265085822232. Its totient is φ = 50322519552.

The previous prime is 126018821323. The next prime is 126018821413. The reversal of 126018821380 is 83128810621.

It can be written as a sum of positive squares in 4 ways, for example, as 16326706176 + 109692115204 = 127776^2 + 331198^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5300907 + ... + 5324626.

It is an arithmetic number, because the mean of its divisors is an integer number (11045242593).

Almost surely, 2^126018821380 is an apocalyptic number.

126018821380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126018821380 is an abundant number, since it is smaller than the sum of its proper divisors (139067000852).

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

126018821380 is a wasteful number, since it uses less digits than its factorization.

126018821380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10626135 (or 10626133 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 40.

The spelling of 126018821380 in words is "one hundred twenty-six billion, eighteen million, eight hundred twenty-one thousand, three hundred eighty".