1611610660 has 24 divisors (see below), whose sum is σ = 3692054016. Its totient is φ = 586040160.

The previous prime is 1611610643. The next prime is 1611610673. The reversal of 1611610660 is 660161161.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3662532 + ... + 3662971.

It is an arithmetic number, because the mean of its divisors is an integer number (153835584).

Almost surely, 2^1611610660 is an apocalyptic number.

1611610660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1611610660 is an abundant number, since it is smaller than the sum of its proper divisors (2080443356).

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

1611610660 is a wasteful number, since it uses less digits than its factorization.

1611610660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7325523 (or 7325521 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1611610660 is about 40144.8709052601. The cubic root of 1611610660 is about 1172.4294273334.

The spelling of 1611610660 in words is "one billion, six hundred eleven million, six hundred ten thousand, six hundred sixty".