1722220361568 has 72 divisors (see below), whose sum is σ = 5597216181648. Its totient is φ = 492062959872.

The previous prime is 1722220361567. The next prime is 1722220361569. The reversal of 1722220361568 is 8651630222271.

1722220361568 is a `hidden beast` number, since 1 + 7 + 2 + 2 + 2 + 20 + 3 + 61 + 568 = 666.

It is an interprime number because it is at equal distance from previous prime (1722220361567) and next prime (1722220361569).

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1722220361567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 427135971 + ... + 427140002.

It is an arithmetic number, because the mean of its divisors is an integer number (77739113634).

Almost surely, 2^{1722220361568} is an apocalyptic number.

1722220361568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1722220361568 is an abundant number, since it is smaller than the sum of its proper divisors (3874995820080).

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

1722220361568 is a wasteful number, since it uses less digits than its factorization.

1722220361568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854275996 (or 854275985 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 1722220361568 in words is "one trillion, seven hundred twenty-two billion, two hundred twenty million, three hundred sixty-one thousand, five hundred sixty-eight".