1806945922564 has 24 divisors (see below), whose sum is σ = 3181506095768. Its totient is φ = 897950085120.

The previous prime is 1806945922549. The next prime is 1806945922571. The reversal of 1806945922564 is 4652295496081.

It can be written as a sum of positive squares in 4 ways, for example, as 64171022400 + 1742774900164 = 253320^2 + 1320142^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488644 + ... + 1962820.

Almost surely, 2^{1806945922564} is an apocalyptic number.

It is an amenable number.

1806945922564 is a deficient number, since it is larger than the sum of its proper divisors (1374560173204).

1806945922564 is a wasteful number, since it uses less digits than its factorization.

1806945922564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476055 (or 1476053 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 61.

The spelling of 1806945922564 in words is "one trillion, eight hundred six billion, nine hundred forty-five million, nine hundred twenty-two thousand, five hundred sixty-four".