919804622945 has 12 divisors (see below), whose sum is σ = 1195201747836. Its totient is φ = 679240336320.

The previous prime is 919804622941. The next prime is 919804622963. The reversal of 919804622945 is 549226408919.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 350553989776 + 569250633169 = 592076^2 + 754487^2 .

It is not a de Polignac number, because 919804622945 - 2² = 919804622941 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (919804622941) 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, 544262246 + ... + 544263935.

It is an arithmetic number, because the mean of its divisors is an integer number (99600145653).

Almost surely, 2^919804622945 is an apocalyptic number.

It is an amenable number.

919804622945 is a deficient number, since it is larger than the sum of its proper divisors (275397124891).

919804622945 is a wasteful number, since it uses less digits than its factorization.

919804622945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088526212 (or 1088526199 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 59.

The spelling of 919804622945 in words is "nine hundred nineteen billion, eight hundred four million, six hundred twenty-two thousand, nine hundred forty-five".