126913573440 has 1344 divisors, whose sum is σ = 524025815040. Its totient is φ = 29023764480.

The previous prime is 126913573429. The next prime is 126913573463. The reversal of 126913573440 is 44375319621.

126913573440 is a `hidden beast` number, since 1 + 2 + 6 + 9 + 135 + 73 + 440 = 666.

It is a super-2 number, since 2×126913573440² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 778610799 + ... + 778610961.

It is an arithmetic number, because the mean of its divisors is an integer number (389900160).

Almost surely, 2^126913573440 is an apocalyptic number.

126913573440 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 126913573440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262012907520).

126913573440 is an abundant number, since it is smaller than the sum of its proper divisors (397112241600).

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

126913573440 is a wasteful number, since it uses less digits than its factorization.

126913573440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 126913573440 in words is "one hundred twenty-six billion, nine hundred thirteen million, five hundred seventy-three thousand, four hundred forty".