1561101610 has 32 divisors (see below), whose sum is σ = 2913356160. Its totient is φ = 601564992.

The previous prime is 1561101583. The next prime is 1561101629. The reversal of 1561101610 is 161011651.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129667 + ... + 141193.

It is an arithmetic number, because the mean of its divisors is an integer number (91042380).

Almost surely, 2^1561101610 is an apocalyptic number.

1561101610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1561101610 is a deficient number, since it is larger than the sum of its proper divisors (1352254550).

1561101610 is a wasteful number, since it uses less digits than its factorization.

1561101610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12030.

The product of its (nonzero) digits is 180, while the sum is 22.

The square root of 1561101610 is about 39510.7784028612. The cubic root of 1561101610 is about 1160.0509316718.

The spelling of 1561101610 in words is "one billion, five hundred sixty-one million, one hundred one thousand, six hundred ten".