3646640477 has 2 divisors, whose sum is σ = 3646640478. Its totient is φ = 3646640476.

The previous prime is 3646640419. The next prime is 3646640483. The reversal of 3646640477 is 7740466463.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2899930201 + 746710276 = 53851^2 + 27326^2 .

It is a cyclic number.

It is not a de Polignac number, because 3646640477 - 2¹² = 3646636381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3646640377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1823320238 + 1823320239.

It is an arithmetic number, because the mean of its divisors is an integer number (1823320239).

Almost surely, 2^3646640477 is an apocalyptic number.

It is an amenable number.

3646640477 is a deficient number, since it is larger than the sum of its proper divisors (1).

3646640477 is an equidigital number, since it uses as much as digits as its factorization.

3646640477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 47.

The square root of 3646640477 is about 60387.4198571192. The cubic root of 3646640477 is about 1539.2091960816.

The spelling of 3646640477 in words is "three billion, six hundred forty-six million, six hundred forty thousand, four hundred seventy-seven".