126366621420 has 96 divisors (see below), whose sum is σ = 381415269312. Its totient is φ = 31075319808.

The previous prime is 126366621401. The next prime is 126366621421. The reversal of 126366621420 is 24126663621.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (126366621421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 727324 + ... + 884156.

It is an arithmetic number, because the mean of its divisors is an integer number (3973075722).

Almost surely, 2^126366621420 is an apocalyptic number.

126366621420 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 126366621420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190707634656).

126366621420 is an abundant number, since it is smaller than the sum of its proper divisors (255048647892).

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

126366621420 is a wasteful number, since it uses less digits than its factorization.

126366621420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157891 (or 157889 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The spelling of 126366621420 in words is "one hundred twenty-six billion, three hundred sixty-six million, six hundred twenty-one thousand, four hundred twenty".