1639726053 has 24 divisors (see below), whose sum is σ = 2586368160. Its totient is φ = 921100320.

The previous prime is 1639726019. The next prime is 1639726057. The reversal of 1639726053 is 3506279361.

It is not a de Polignac number, because 1639726053 - 2⁹ = 1639725541 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1639725996 and 1639726014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1639726057) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85858 + ... + 103203.

It is an arithmetic number, because the mean of its divisors is an integer number (107765340).

Almost surely, 2^1639726053 is an apocalyptic number.

It is an amenable number.

1639726053 is a deficient number, since it is larger than the sum of its proper divisors (946642107).

1639726053 is a wasteful number, since it uses less digits than its factorization.

1639726053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189137 (or 189130 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 42.

The square root of 1639726053 is about 40493.5310018773. The cubic root of 1639726053 is about 1179.2080420420.

The spelling of 1639726053 in words is "one billion, six hundred thirty-nine million, seven hundred twenty-six thousand, fifty-three".