1639416856 has 32 divisors (see below), whose sum is σ = 3832404480. Its totient is φ = 638733600.

The previous prime is 1639416853. The next prime is 1639416859. The reversal of 1639416856 is 6586149361.

It is an interprime number because it is at equal distance from previous prime (1639416853) and next prime (1639416859).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1639416853) 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 7 ways as a sum of consecutive naturals, for example, 1330080 + ... + 1331311.

It is an arithmetic number, because the mean of its divisors is an integer number (119762640).

Almost surely, 2^1639416856 is an apocalyptic number.

It is an amenable number.

1639416856 is an abundant number, since it is smaller than the sum of its proper divisors (2192987624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1639416856 is a wasteful number, since it uses less digits than its factorization.

1639416856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661415 (or 2661411 counting only the distinct ones).

The product of its digits is 933120, while the sum is 49.

The square root of 1639416856 is about 40489.7129651471. The cubic root of 1639416856 is about 1179.1339177682.

The spelling of 1639416856 in words is "one billion, six hundred thirty-nine million, four hundred sixteen thousand, eight hundred fifty-six".