3654646407 has 6 divisors (see below), whose sum is σ = 5278933712. Its totient is φ = 2436430932.

The previous prime is 3654646363. The next prime is 3654646423. The reversal of 3654646407 is 7046464563.

It is a happy number.

It is not a de Polignac number, because 3654646407 - 2¹² = 3654642311 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 (3654646607) 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, 203035903 + ... + 203035920.

Almost surely, 2^3654646407 is an apocalyptic number.

3654646407 is a deficient number, since it is larger than the sum of its proper divisors (1624287305).

3654646407 is a wasteful number, since it uses less digits than its factorization.

3654646407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406071829 (or 406071826 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 45.

The square root of 3654646407 is about 60453.6715758439. The cubic root of 3654646407 is about 1540.3347794970.

The spelling of 3654646407 in words is "three billion, six hundred fifty-four million, six hundred forty-six thousand, four hundred seven".