1653222644 has 6 divisors (see below), whose sum is σ = 2893139634. Its totient is φ = 826611320.

The previous prime is 1653222617. The next prime is 1653222667. The reversal of 1653222644 is 4462223561.

It can be written as a sum of positive squares in only one way, i.e., 1551414544 + 101808100 = 39388^2 + 10090^2 .

It is a super-2 number, since 2×1653222644² = 5466290221268701472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 206652827 + ... + 206652834.

It is an arithmetic number, because the mean of its divisors is an integer number (482189939).

Almost surely, 2^1653222644 is an apocalyptic number.

It is an amenable number.

1653222644 is a deficient number, since it is larger than the sum of its proper divisors (1239916990).

1653222644 is a wasteful number, since it uses less digits than its factorization.

1653222644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413305665 (or 413305663 counting only the distinct ones).

The product of its digits is 69120, while the sum is 35.

The square root of 1653222644 is about 40659.8406784877. The cubic root of 1653222644 is about 1182.4345608741.

The spelling of 1653222644 in words is "one billion, six hundred fifty-three million, two hundred twenty-two thousand, six hundred forty-four".