1638790416740 has 48 divisors (see below), whose sum is σ = 3449888932224. Its totient is φ = 653912352000.

The previous prime is 1638790416673. The next prime is 1638790416793. The reversal of 1638790416740 is 476140978361.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15465017 + ... + 15570623.

It is an arithmetic number, because the mean of its divisors is an integer number (71872686088).

Almost surely, 2^{1638790416740} is an apocalyptic number.

1638790416740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1638790416740 is an abundant number, since it is smaller than the sum of its proper divisors (1811098515484).

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

1638790416740 is a wasteful number, since it uses less digits than its factorization.

1638790416740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107508 (or 107506 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 56.

The spelling of 1638790416740 in words is "one trillion, six hundred thirty-eight billion, seven hundred ninety million, four hundred sixteen thousand, seven hundred forty".