1649919537 has 80 divisors (see below), whose sum is σ = 2909947392. Its totient is φ = 912124800.

The previous prime is 1649919517. The next prime is 1649919553. The reversal of 1649919537 is 7359199461.

1649919537 is a `hidden beast` number, since 1 + 6 + 4 + 99 + 19 + 537 = 666.

It is not a de Polignac number, because 1649919537 - 2¹² = 1649915441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1649919517) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2691243 + ... + 2691855.

Almost surely, 2^1649919537 is an apocalyptic number.

It is an amenable number.

1649919537 is a deficient number, since it is larger than the sum of its proper divisors (1260027855).

1649919537 is a wasteful number, since it uses less digits than its factorization.

1649919537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780 (or 771 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The square root of 1649919537 is about 40619.2015800409. The cubic root of 1649919537 is about 1181.6465419994.

The spelling of 1649919537 in words is "one billion, six hundred forty-nine million, nine hundred nineteen thousand, five hundred thirty-seven".