1561061010 has 32 divisors (see below), whose sum is σ = 3875739840. Its totient is φ = 401928128.

The previous prime is 1561061009. The next prime is 1561061041. The reversal of 1561061010 is 101601651.

It is a super-2 number, since 2×1561061010² = 4873822953884440200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 896292 + ... + 898031.

It is an arithmetic number, because the mean of its divisors is an integer number (121116870).

Almost surely, 2^1561061010 is an apocalyptic number.

1561061010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1561061010 is an abundant number, since it is smaller than the sum of its proper divisors (2314678830).

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

1561061010 is a wasteful number, since it uses less digits than its factorization.

1561061010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794362.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 1561061010 is about 39510.2646156666. The cubic root of 1561061010 is about 1160.0408749964.

Adding to 1561061010 its reverse (101601651), we get a palindrome (1662662661).

The spelling of 1561061010 in words is "one billion, five hundred sixty-one million, sixty-one thousand, ten".