126404030520 has 128 divisors (see below), whose sum is σ = 421677792000. Its totient is φ = 33681260160.

The previous prime is 126404030483. The next prime is 126404030549. The reversal of 126404030520 is 25030404621.

126404030520 is a `hidden beast` number, since 12 + 64 + 0 + 40 + 30 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1348951 + ... + 1439609.

It is an arithmetic number, because the mean of its divisors is an integer number (3294357750).

Almost surely, 2^126404030520 is an apocalyptic number.

126404030520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126404030520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210838896000).

126404030520 is an abundant number, since it is smaller than the sum of its proper divisors (295273761480).

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

126404030520 is a wasteful number, since it uses less digits than its factorization.

126404030520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91970 (or 91960 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The spelling of 126404030520 in words is "one hundred twenty-six billion, four hundred four million, thirty thousand, five hundred twenty".