126381487051620 has 72 divisors (see below), whose sum is σ = 393718182204984. Its totient is φ = 32790872314368.

The previous prime is 126381487051483. The next prime is 126381487051649. The reversal of 126381487051620 is 26150784183621.

It is a happy number.

126381487051620 is a `hidden beast` number, since 1 + 2 + 6 + 3 + 8 + 1 + 4 + 8 + 7 + 0 + 5 + 1 + 620 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 61474004767296 + 64907482284324 = 7840536^2 + 8056518^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9488092969 + ... + 9488106288.

Almost surely, 2^{126381487051620} is an apocalyptic number.

126381487051620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126381487051620 is an abundant number, since it is smaller than the sum of its proper divisors (267336695153364).

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

126381487051620 is a wasteful number, since it uses less digits than its factorization.

126381487051620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18976199309 (or 18976199304 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 126381487051620 in words is "one hundred twenty-six trillion, three hundred eighty-one billion, four hundred eighty-seven million, fifty-one thousand, six hundred twenty".