3649661760 has 56 divisors (see below), whose sum is σ = 11587679136. Its totient is φ = 973242880.

The previous prime is 3649661753. The next prime is 3649661767. The reversal of 3649661760 is 671669463.

It is an interprime number because it is at equal distance from previous prime (3649661753) and next prime (3649661767).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649661767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1899906 + ... + 1901825.

Almost surely, 2^3649661760 is an apocalyptic number.

3649661760 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3649661760 is an abundant number, since it is smaller than the sum of its proper divisors (7938017376).

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

3649661760 is a wasteful number, since it uses less digits than its factorization.

3649661760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3801751 (or 3801741 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 48.

The square root of 3649661760 is about 60412.4305089607. The cubic root of 3649661760 is about 1539.6341628328.

The spelling of 3649661760 in words is "three billion, six hundred forty-nine million, six hundred sixty-one thousand, seven hundred sixty".