22165587450 has 72 divisors (see below), whose sum is σ = 61472601216. Its totient is φ = 5720148000.

The previous prime is 22165587449. The next prime is 22165587463. The reversal of 22165587450 is 5478556122.

22165587450 is a `hidden beast` number, since 2 + 2 + 1 + 65 + 587 + 4 + 5 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 22165587396 and 22165587405.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 780516 + ... + 808415.

It is an arithmetic number, because the mean of its divisors is an integer number (853786128).

Almost surely, 2^22165587450 is an apocalyptic number.

22165587450 is an abundant number, since it is smaller than the sum of its proper divisors (39307013766).

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

22165587450 is a wasteful number, since it uses less digits than its factorization.

22165587450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588980 (or 1588972 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 45.

The spelling of 22165587450 in words is "twenty-two billion, one hundred sixty-five million, five hundred eighty-seven thousand, four hundred fifty".