22641447690 has 48 divisors (see below), whose sum is σ = 58939658856. Its totient is φ = 6030345600.

The previous prime is 22641447643. The next prime is 22641447691. The reversal of 22641447690 is 9674414622.

22641447690 is a `hidden beast` number, since 22 + 64 + 14 + 476 + 90 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 13513365009 + 9128082681 = 116247^2 + 95541^2 .

It is a super-2 number, since 2×22641447690² (a number of 22 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (22641447691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79321 + ... + 227100.

Almost surely, 2^22641447690 is an apocalyptic number.

22641447690 is an abundant number, since it is smaller than the sum of its proper divisors (36298211166).

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

22641447690 is a wasteful number, since it uses less digits than its factorization.

22641447690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307255 (or 307252 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 22641447690 in words is "twenty-two billion, six hundred forty-one million, four hundred forty-seven thousand, six hundred ninety".