1161661510 has 24 divisors (see below), whose sum is σ = 2221230960. Its totient is φ = 437330304.

The previous prime is 1161661451. The next prime is 1161661517. The reversal of 1161661510 is 151661611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161661517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198090 + ... + 203869.

It is an arithmetic number, because the mean of its divisors is an integer number (92551290).

Almost surely, 2^1161661510 is an apocalyptic number.

1161661510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1161661510 is a deficient number, since it is larger than the sum of its proper divisors (1059569450).

1161661510 is a wasteful number, since it uses less digits than its factorization.

1161661510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402000 (or 401983 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 1161661510 is about 34083.1558104586. The cubic root of 1161661510 is about 1051.2189954487.

The spelling of 1161661510 in words is "one billion, one hundred sixty-one million, six hundred sixty-one thousand, five hundred ten".