1639326260040 has 192 divisors, whose sum is σ = 5806302264000. Its totient is φ = 369110472192.

The previous prime is 1639326259981. The next prime is 1639326260053. The reversal of 1639326260040 is 400626239361.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1639326259974 and 1639326260001.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1686615 + ... + 2474534.

It is an arithmetic number, because the mean of its divisors is an integer number (30241157625).

Almost surely, 2^{1639326260040} is an apocalyptic number.

1639326260040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1639326260040 is an abundant number, since it is smaller than the sum of its proper divisors (4166976003960).

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

1639326260040 is a wasteful number, since it uses less digits than its factorization.

1639326260040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4161244 (or 4161233 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 42.

The spelling of 1639326260040 in words is "one trillion, six hundred thirty-nine billion, three hundred twenty-six million, two hundred sixty thousand, forty".