1561601654 has 16 divisors (see below), whose sum is σ = 2379404160. Its totient is φ = 768546240.

The previous prime is 1561601651. The next prime is 1561601663. The reversal of 1561601654 is 4561061651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561601651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20024 + ... + 59364.

It is an arithmetic number, because the mean of its divisors is an integer number (148712760).

Almost surely, 2^1561601654 is an apocalyptic number.

1561601654 is a deficient number, since it is larger than the sum of its proper divisors (817802506).

1561601654 is a wasteful number, since it uses less digits than its factorization.

1561601654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39655.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 1561601654 is about 39517.1058403826. The cubic root of 1561601654 is about 1160.1747789558.

The spelling of 1561601654 in words is "one billion, five hundred sixty-one million, six hundred one thousand, six hundred fifty-four".