1649697480 has 96 divisors (see below), whose sum is σ = 5546431800. Its totient is φ = 424747008.

The previous prime is 1649697479. The next prime is 1649697547. The reversal of 1649697480 is 847969461.

1649697480 is a `hidden beast` number, since 1 + 6 + 496 + 9 + 74 + 80 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1412106084 + 237591396 = 37578^2 + 15414^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68569 + ... + 89448.

Almost surely, 2^1649697480 is an apocalyptic number.

1649697480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1649697480 is an abundant number, since it is smaller than the sum of its proper divisors (3896734320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1649697480 is a wasteful number, since it uses less digits than its factorization.

1649697480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158063 (or 158056 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 1649697480 is about 40616.4680886953. The cubic root of 1649697480 is about 1181.5935283721.

The spelling of 1649697480 in words is "one billion, six hundred forty-nine million, six hundred ninety-seven thousand, four hundred eighty".