1649918151 has 24 divisors (see below), whose sum is σ = 2779264800. Its totient is φ = 942808608.

The previous prime is 1649918147. The next prime is 1649918167. The reversal of 1649918151 is 1518199461.

1649918151 is a `hidden beast` number, since 1 + 6 + 499 + 1 + 8 + 151 = 666.

It is not a de Polignac number, because 1649918151 - 2² = 1649918147 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1649918097 and 1649918106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649918131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 264150 + ... + 270323.

It is an arithmetic number, because the mean of its divisors is an integer number (115802700).

Almost surely, 2^1649918151 is an apocalyptic number.

1649918151 is a deficient number, since it is larger than the sum of its proper divisors (1129346649).

1649918151 is an equidigital number, since it uses as much as digits as its factorization.

1649918151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534500 (or 534483 counting only the distinct ones).

The product of its digits is 77760, while the sum is 45.

The square root of 1649918151 is about 40619.1845191407. The cubic root of 1649918151 is about 1181.6462111222.

The spelling of 1649918151 in words is "one billion, six hundred forty-nine million, nine hundred eighteen thousand, one hundred fifty-one".