126784880640 has 840 divisors, whose sum is σ = 500254575408. Its totient is φ = 30576476160.

The previous prime is 126784880633. The next prime is 126784880659. The reversal of 126784880640 is 46088487621.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 656916384 + ... + 656916576.

Almost surely, 2^126784880640 is an apocalyptic number.

126784880640 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 126784880640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250127287704).

126784880640 is an abundant number, since it is smaller than the sum of its proper divisors (373469694768).

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

126784880640 is an frugal number, since it uses more digits than its factorization.

126784880640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 54.

The spelling of 126784880640 in words is "one hundred twenty-six billion, seven hundred eighty-four million, eight hundred eighty thousand, six hundred forty".