21623522061552 has 40 divisors (see below), whose sum is σ = 55868185673040. Its totient is φ = 7206883223040.

The previous prime is 21623522061517. The next prime is 21623522061571. The reversal of 21623522061552 is 25516022532612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29555599 + ... + 30278382.

It is an arithmetic number, because the mean of its divisors is an integer number (1396704641826).

Almost surely, 2^{21623522061552} is an apocalyptic number.

It is an amenable number.

21623522061552 is an abundant number, since it is smaller than the sum of its proper divisors (34244663611488).

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

21623522061552 is a wasteful number, since it uses less digits than its factorization.

21623522061552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59841521 (or 59841515 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 21623522061552 in words is "twenty-one trillion, six hundred twenty-three billion, five hundred twenty-two million, sixty-one thousand, five hundred fifty-two".