3561145687 has 8 divisors (see below), whose sum is σ = 3891190032. Its totient is φ = 3232152000.

The previous prime is 3561145681. The next prime is 3561145691. The reversal of 3561145687 is 7865411653.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3561145687 - 2⁷ = 3561145559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3561145681) 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, 255564 + ... + 269137.

It is an arithmetic number, because the mean of its divisors is an integer number (486398754).

Almost surely, 2^3561145687 is an apocalyptic number.

3561145687 is a deficient number, since it is larger than the sum of its proper divisors (330044345).

3561145687 is a wasteful number, since it uses less digits than its factorization.

3561145687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525329.

The product of its digits is 604800, while the sum is 46.

The square root of 3561145687 is about 59675.3356672587. The cubic root of 3561145687 is about 1527.0851257877.

The spelling of 3561145687 in words is "three billion, five hundred sixty-one million, one hundred forty-five thousand, six hundred eighty-seven".