1650861005 has 16 divisors (see below), whose sum is σ = 2069072640. Its totient is φ = 1263206592.

The previous prime is 1650861001. The next prime is 1650861019. The reversal of 1650861005 is 5001680561.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1650861005 - 2² = 1650861001 is a prime.

It is a super-2 number, since 2×1650861005² = 5450684115659220050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1650861001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64709 + ... + 86538.

It is an arithmetic number, because the mean of its divisors is an integer number (129317040).

Almost surely, 2^1650861005 is an apocalyptic number.

It is an amenable number.

1650861005 is a deficient number, since it is larger than the sum of its proper divisors (418211635).

1650861005 is a wasteful number, since it uses less digits than its factorization.

1650861005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151348.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 1650861005 is about 40630.7888798630. The cubic root of 1650861005 is about 1181.8712541443.

The spelling of 1650861005 in words is "one billion, six hundred fifty million, eight hundred sixty-one thousand, five".