1561451848 has 16 divisors (see below), whose sum is σ = 3193878960. Its totient is φ = 709750800.

The previous prime is 1561451839. The next prime is 1561451849. The reversal of 1561451848 is 8481541651.

It is not an unprimeable number, because it can be changed into a prime (1561451849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8871798 + ... + 8871973.

It is an arithmetic number, because the mean of its divisors is an integer number (199617435).

Almost surely, 2^1561451848 is an apocalyptic number.

It is an amenable number.

1561451848 is an abundant number, since it is smaller than the sum of its proper divisors (1632427112).

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

1561451848 is a wasteful number, since it uses less digits than its factorization.

1561451848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17743788 (or 17743784 counting only the distinct ones).

The product of its digits is 153600, while the sum is 43.

The square root of 1561451848 is about 39515.2103372866. The cubic root of 1561451848 is about 1160.1376788626.

The spelling of 1561451848 in words is "one billion, five hundred sixty-one million, four hundred fifty-one thousand, eight hundred forty-eight".