10421662656520 has 64 divisors (see below), whose sum is σ = 23721673921920. Its totient is φ = 4120298440704.

The previous prime is 10421662656407. The next prime is 10421662656521. The reversal of 10421662656520 is 2565626612401.

It is a super-2 number, since 2×10421662656520² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10421662656521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263529 + ... + 4573048.

It is an arithmetic number, because the mean of its divisors is an integer number (370651155030).

Almost surely, 2^{10421662656520} is an apocalyptic number.

10421662656520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10421662656520 is an abundant number, since it is smaller than the sum of its proper divisors (13300011265400).

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

10421662656520 is a wasteful number, since it uses less digits than its factorization.

10421662656520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4837214 (or 4837210 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 10421662656520 in words is "ten trillion, four hundred twenty-one billion, six hundred sixty-two million, six hundred fifty-six thousand, five hundred twenty".