4256123063640 has 192 divisors, whose sum is σ = 15096493985760. Its totient is φ = 956880046080.

The previous prime is 4256123063639. The next prime is 4256123063657. The reversal of 4256123063640 is 463603216524.

It is a happy number.

It is a super-2 number, since 2×4256123063640² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 4256123063592 and 4256123063601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5574357 + ... + 6291716.

Almost surely, 2^{4256123063640} is an apocalyptic number.

4256123063640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4256123063640 is an abundant number, since it is smaller than the sum of its proper divisors (10840370922120).

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

4256123063640 is a wasteful number, since it uses less digits than its factorization.

4256123063640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11866162 (or 11866151 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 42.

The spelling of 4256123063640 in words is "four trillion, two hundred fifty-six billion, one hundred twenty-three million, sixty-three thousand, six hundred forty".