3655765440 has 112 divisors (see below), whose sum is σ = 12896758560. Its totient is φ = 974868480.

The previous prime is 3655765439. The next prime is 3655765447. The reversal of 3655765440 is 445675563.

3655765440 is a `hidden beast` number, since 3 + 6 + 557 + 6 + 54 + 40 = 666.

3655765440 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3655765447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202921 + ... + 220200.

It is an arithmetic number, because the mean of its divisors is an integer number (115149630).

Almost surely, 2^3655765440 is an apocalyptic number.

3655765440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3655765440 is an abundant number, since it is smaller than the sum of its proper divisors (9240993120).

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

3655765440 is a wasteful number, since it uses less digits than its factorization.

3655765440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423147 (or 423131 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 45.

The square root of 3655765440 is about 60462.9261614090. The cubic root of 3655765440 is about 1540.4919775183.

The spelling of 3655765440 in words is "three billion, six hundred fifty-five million, seven hundred sixty-five thousand, four hundred forty".