1639464671040 has 448 divisors, whose sum is σ = 6129379745280. Its totient is φ = 363526225920.

The previous prime is 1639464671029. The next prime is 1639464671063. The reversal of 1639464671040 is 401764649361.

It is a tau number, because it is divible by the number of its divisors (448).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31672380 + ... + 31724100.

Almost surely, 2^{1639464671040} is an apocalyptic number.

1639464671040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1639464671040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3064689872640).

1639464671040 is an abundant number, since it is smaller than the sum of its proper divisors (4489915074240).

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

1639464671040 is a wasteful number, since it uses less digits than its factorization.

1639464671040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51890 (or 51880 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 51.

The spelling of 1639464671040 in words is "one trillion, six hundred thirty-nine billion, four hundred sixty-four million, six hundred seventy-one thousand, forty".