21163145066526 has 8 divisors (see below), whose sum is σ = 42326290133064. Its totient is φ = 7054381688840.

The previous prime is 21163145066519. The next prime is 21163145066563. The reversal of 21163145066526 is 62566054136112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

21163145066526 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1763595422205 + ... + 1763595422216.

It is an arithmetic number, because the mean of its divisors is an integer number (5290786266633).

Almost surely, 2^{21163145066526} is an apocalyptic number.

21163145066526 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21163145066526 is a wasteful number, since it uses less digits than its factorization.

21163145066526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3527190844426.

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 21163145066526 in words is "twenty-one trillion, one hundred sixty-three billion, one hundred forty-five million, sixty-six thousand, five hundred twenty-six".