126403069520 has 240 divisors, whose sum is σ = 371084249088. Its totient is φ = 39687459840.

The previous prime is 126403069469. The next prime is 126403069553. The reversal of 126403069520 is 25960304621.

It is a super-3 number, since 3×126403069520³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 6462155 + ... + 6481685.

Almost surely, 2^126403069520 is an apocalyptic number.

126403069520 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 126403069520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185542124544).

126403069520 is an abundant number, since it is smaller than the sum of its proper divisors (244681179568).

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

126403069520 is a wasteful number, since it uses less digits than its factorization.

126403069520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19698 (or 19685 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 126403069520 in words is "one hundred twenty-six billion, four hundred three million, sixty-nine thousand, five hundred twenty".