1639334157 has 32 divisors (see below), whose sum is σ = 2393846784. Its totient is φ = 993408000.

The previous prime is 1639334143. The next prime is 1639334159. The reversal of 1639334157 is 7514339361.

It is a happy number.

It is not a de Polignac number, because 1639334157 - 2⁶ = 1639334093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1639334159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1259407 + ... + 1260707.

It is an arithmetic number, because the mean of its divisors is an integer number (74807712).

Almost surely, 2^1639334157 is an apocalyptic number.

1639334157 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1639334157 is a deficient number, since it is larger than the sum of its proper divisors (754512627).

1639334157 is a wasteful number, since it uses less digits than its factorization.

1639334157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149.

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

The square root of 1639334157 is about 40488.6917175648. The cubic root of 1639334157 is about 1179.1140906296.

The spelling of 1639334157 in words is "one billion, six hundred thirty-nine million, three hundred thirty-four thousand, one hundred fifty-seven".