3656451949 has 2 divisors, whose sum is σ = 3656451950. Its totient is φ = 3656451948.

The previous prime is 3656451947. The next prime is 3656451983. The reversal of 3656451949 is 9491546563.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1879829449 + 1776622500 = 43357^2 + 42150^2 .

It is a cyclic number.

It is not a de Polignac number, because 3656451949 - 2¹ = 3656451947 is a prime.

Together with 3656451947, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3656451896 and 3656451905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3656451943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1828225974 + 1828225975.

It is an arithmetic number, because the mean of its divisors is an integer number (1828225975).

Almost surely, 2^3656451949 is an apocalyptic number.

It is an amenable number.

3656451949 is a deficient number, since it is larger than the sum of its proper divisors (1).

3656451949 is an equidigital number, since it uses as much as digits as its factorization.

3656451949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3499200, while the sum is 52.

The square root of 3656451949 is about 60468.6030018885. The cubic root of 3656451949 is about 1540.5884001355.

The spelling of 3656451949 in words is "three billion, six hundred fifty-six million, four hundred fifty-one thousand, nine hundred forty-nine".