1650713688 has 128 divisors (see below), whose sum is σ = 4952908800. Its totient is φ = 506383488.

The previous prime is 1650713681. The next prime is 1650713689. The reversal of 1650713688 is 8863170561.

1650713688 is a `hidden beast` number, since 1 + 6 + 507 + 136 + 8 + 8 = 666.

It is a super-2 number, since 2×1650713688² = 5449711359501122688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1650713681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1243281 + ... + 1244607.

It is an arithmetic number, because the mean of its divisors is an integer number (38694600).

Almost surely, 2^1650713688 is an apocalyptic number.

1650713688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1650713688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2476454400).

1650713688 is an abundant number, since it is smaller than the sum of its proper divisors (3302195112).

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

1650713688 is a wasteful number, since it uses less digits than its factorization.

1650713688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798 (or 1788 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 1650713688 is about 40628.9759654363. The cubic root of 1650713688 is about 1181.8360977610.

The spelling of 1650713688 in words is "one billion, six hundred fifty million, seven hundred thirteen thousand, six hundred eighty-eight".