1654044042645 has 24 divisors (see below), whose sum is σ = 2868448369176. Its totient is φ = 881714147328.

The previous prime is 1654044042619. The next prime is 1654044042701. The reversal of 1654044042645 is 5462404404561.

1654044042645 is a `hidden beast` number, since 1 + 6 + 540 + 4 + 4 + 0 + 42 + 64 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 712162146609 + 941881896036 = 843897^2 + 970506^2 .

It is not a de Polignac number, because 1654044042645 - 2¹⁷ = 1654043911573 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1654044042645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9131724 + ... + 9311093.

It is an arithmetic number, because the mean of its divisors is an integer number (119518682049).

Almost surely, 2^{1654044042645} is an apocalyptic number.

1654044042645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1654044042645 is a deficient number, since it is larger than the sum of its proper divisors (1214404326531).

1654044042645 is a wasteful number, since it uses less digits than its factorization.

1654044042645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18444821 (or 18444818 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 45.

The spelling of 1654044042645 in words is "one trillion, six hundred fifty-four billion, forty-four million, forty-two thousand, six hundred forty-five".