1636381677 has 16 divisors (see below), whose sum is σ = 2495296640. Its totient is φ = 934414272.

The previous prime is 1636381619. The next prime is 1636381693. The reversal of 1636381677 is 7761836361.

1636381677 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1636381677 - 2⁸ = 1636381421 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1636381177) 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, 3699 + ... + 57327.

It is an arithmetic number, because the mean of its divisors is an integer number (155956040).

Almost surely, 2^1636381677 is an apocalyptic number.

It is an amenable number.

1636381677 is a deficient number, since it is larger than the sum of its proper divisors (858914963).

1636381677 is a wasteful number, since it uses less digits than its factorization.

1636381677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55092.

The product of its digits is 762048, while the sum is 48.

The square root of 1636381677 is about 40452.2147354134. The cubic root of 1636381677 is about 1178.4057943530.

The spelling of 1636381677 in words is "one billion, six hundred thirty-six million, three hundred eighty-one thousand, six hundred seventy-seven".