1220064845 has 16 divisors (see below), whose sum is σ = 1475601408. Its totient is φ = 968400960.

The previous prime is 1220064827. The next prime is 1220064847. The reversal of 1220064845 is 5484600221.

It is not a de Polignac number, because 1220064845 - 2⁸ = 1220064589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220064847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358100 + ... + 361490.

It is an arithmetic number, because the mean of its divisors is an integer number (92225088).

Almost surely, 2^1220064845 is an apocalyptic number.

It is an amenable number.

1220064845 is a deficient number, since it is larger than the sum of its proper divisors (255536563).

1220064845 is a wasteful number, since it uses less digits than its factorization.

1220064845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3940.

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 1220064845 is about 34929.4266342865. The cubic root of 1220064845 is about 1068.5486611824.

The spelling of 1220064845 in words is "one billion, two hundred twenty million, sixty-four thousand, eight hundred forty-five".