1561610562 has 8 divisors (see below), whose sum is σ = 3123221136. Its totient is φ = 520536852.

The previous prime is 1561610549. The next prime is 1561610563. The reversal of 1561610562 is 2650161651.

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

1561610562 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1561610563) 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, 130134208 + ... + 130134219.

It is an arithmetic number, because the mean of its divisors is an integer number (390402642).

Almost surely, 2^1561610562 is an apocalyptic number.

1561610562 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1561610562 is a wasteful number, since it uses less digits than its factorization.

1561610562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260268432.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 1561610562 is about 39517.2185509051. The cubic root of 1561610562 is about 1160.1769849851.

The spelling of 1561610562 in words is "one billion, five hundred sixty-one million, six hundred ten thousand, five hundred sixty-two".