126978631344 has 140 divisors (see below), whose sum is σ = 371000959776. Its totient is φ = 42080881536.

The previous prime is 126978631291. The next prime is 126978631453. The reversal of 126978631344 is 443136879621.

126978631344 is a `hidden beast` number, since 1 + 269 + 7 + 8 + 6 + 31 + 344 = 666.

It is a super-2 number, since 2×126978631344² (a number of 23 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1986409 + ... + 2049335.

Almost surely, 2^126978631344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126978631344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185500479888).

126978631344 is an abundant number, since it is smaller than the sum of its proper divisors (244022328432).

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

126978631344 is an equidigital number, since it uses as much as digits as its factorization.

126978631344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63126 (or 63105 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The spelling of 126978631344 in words is "one hundred twenty-six billion, nine hundred seventy-eight million, six hundred thirty-one thousand, three hundred forty-four".