1641610287 has 32 divisors (see below), whose sum is σ = 2623700160. Its totient is φ = 1010580480.

The previous prime is 1641610273. The next prime is 1641610291. The reversal of 1641610287 is 7820161461.

It is a happy number.

1641610287 is a `hidden beast` number, since 1 + 641 + 6 + 1 + 0 + 2 + 8 + 7 = 666.

It is not a de Polignac number, because 1641610287 - 2¹⁴ = 1641593903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641610247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9414 + ... + 58067.

It is an arithmetic number, because the mean of its divisors is an integer number (81990630).

Almost surely, 2^1641610287 is an apocalyptic number.

1641610287 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1641610287 is a deficient number, since it is larger than the sum of its proper divisors (982089873).

1641610287 is a wasteful number, since it uses less digits than its factorization.

1641610287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67560 (or 67554 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1641610287 is about 40516.7901862919. The cubic root of 1641610287 is about 1179.6595510711.

The spelling of 1641610287 in words is "one billion, six hundred forty-one million, six hundred ten thousand, two hundred eighty-seven".