3657686901 has 16 divisors (see below), whose sum is σ = 5633229888. Its totient is φ = 2086380800.

The previous prime is 3657686873. The next prime is 3657686909. The reversal of 3657686901 is 1096867563.

It is a cyclic number.

It is not a de Polignac number, because 3657686901 - 2²² = 3653492597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3657686909) 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 15 ways as a sum of consecutive naturals, for example, 3259410 + ... + 3260531.

It is an arithmetic number, because the mean of its divisors is an integer number (352076868).

Almost surely, 2^3657686901 is an apocalyptic number.

It is an amenable number.

3657686901 is a deficient number, since it is larger than the sum of its proper divisors (1975542987).

3657686901 is a wasteful number, since it uses less digits than its factorization.

3657686901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6519972.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 3657686901 is about 60478.8136540392. The cubic root of 3657686901 is about 1540.7618231331.

The spelling of 3657686901 in words is "three billion, six hundred fifty-seven million, six hundred eighty-six thousand, nine hundred one".