1649737701 has 6 divisors (see below), whose sum is σ = 2382954470. Its totient is φ = 1099825128.

The previous prime is 1649737693. The next prime is 1649737729. The reversal of 1649737701 is 1077379461.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1636121601 + 13616100 = 40449^2 + 3690^2 .

It is not a de Polignac number, because 1649737701 - 2³ = 1649737693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649737751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 91652086 + ... + 91652103.

Almost surely, 2^1649737701 is an apocalyptic number.

It is an amenable number.

1649737701 is a deficient number, since it is larger than the sum of its proper divisors (733216769).

1649737701 is a wasteful number, since it uses less digits than its factorization.

1649737701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183304195 (or 183304192 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 45.

The square root of 1649737701 is about 40616.9632173554. The cubic root of 1649737701 is about 1181.6031310392.

The spelling of 1649737701 in words is "one billion, six hundred forty-nine million, seven hundred thirty-seven thousand, seven hundred one".