1561043346 has 16 divisors (see below), whose sum is σ = 3166060608. Its totient is φ = 513018800.

The previous prime is 1561043317. The next prime is 1561043371. The reversal of 1561043346 is 6433401651.

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, 1831785 + ... + 1832636.

It is an arithmetic number, because the mean of its divisors is an integer number (197878788).

Almost surely, 2^1561043346 is an apocalyptic number.

1561043346 is an abundant number, since it is smaller than the sum of its proper divisors (1605017262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1561043346 is a wasteful number, since it uses less digits than its factorization.

1561043346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3664497.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 1561043346 is about 39510.0410781867. The cubic root of 1561043346 is about 1160.0364995451.

Adding to 1561043346 its reverse (6433401651), we get a palindrome (7994444997).

The spelling of 1561043346 in words is "one billion, five hundred sixty-one million, forty-three thousand, three hundred forty-six".