21623536161456 has 40 divisors (see below), whose sum is σ = 56111298647040. Its totient is φ = 7175523206976.

The previous prime is 21623536161407. The next prime is 21623536161529. The reversal of 21623536161456 is 65416163532612.

It is a happy number.

It is a super-2 number, since 2×21623536161456² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21623536161399 and 21623536161408.

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, 1010057316 + ... + 1010078723.

It is an arithmetic number, because the mean of its divisors is an integer number (1402782466176).

Almost surely, 2^{21623536161456} is an apocalyptic number.

It is an amenable number.

21623536161456 is an abundant number, since it is smaller than the sum of its proper divisors (34487762485584).

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

21623536161456 is a wasteful number, since it uses less digits than its factorization.

21623536161456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020136273 (or 2020136267 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 51.

The spelling of 21623536161456 in words is "twenty-one trillion, six hundred twenty-three billion, five hundred thirty-six million, one hundred sixty-one thousand, four hundred fifty-six".