1561330630 has 8 divisors (see below), whose sum is σ = 2810395152. Its totient is φ = 624532248.

The previous prime is 1561330613. The next prime is 1561330633. The reversal of 1561330630 is 360331651.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561330633) 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, 78066522 + ... + 78066541.

It is an arithmetic number, because the mean of its divisors is an integer number (351299394).

Almost surely, 2^1561330630 is an apocalyptic number.

1561330630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1561330630 is a deficient number, since it is larger than the sum of its proper divisors (1249064522).

1561330630 is a wasteful number, since it uses less digits than its factorization.

1561330630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156133070.

The product of its (nonzero) digits is 4860, while the sum is 28.

The square root of 1561330630 is about 39513.6764930827. The cubic root of 1561330630 is about 1160.1076569722.

The spelling of 1561330630 in words is "one billion, five hundred sixty-one million, three hundred thirty thousand, six hundred thirty".