1806992918451 has 54 divisors (see below), whose sum is σ = 3112101918276. Its totient is φ = 1007382398400.

The previous prime is 1806992918413. The next prime is 1806992918483. The reversal of 1806992918451 is 1548192996081.

1806992918451 is a `hidden beast` number, since 1 + 8 + 0 + 6 + 9 + 92 + 91 + 8 + 451 = 666.

It is not a de Polignac number, because 1806992918451 - 2⁷ = 1806992918323 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (1806992918251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 477445 + ... + 1960086.

Almost surely, 2^{1806992918451} is an apocalyptic number.

1806992918451 is a deficient number, since it is larger than the sum of its proper divisors (1305108999825).

1806992918451 is a wasteful number, since it uses less digits than its factorization.

1806992918451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437633 (or 2437582 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 63.

The spelling of 1806992918451 in words is "one trillion, eight hundred six billion, nine hundred ninety-two million, nine hundred eighteen thousand, four hundred fifty-one".