1780138302732 has 18 divisors (see below), whose sum is σ = 4499794043108. Its totient is φ = 593379434232.

The previous prime is 1780138302721. The next prime is 1780138302749. The reversal of 1780138302732 is 2372038310871.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24724143058 + ... + 24724143129.

Almost surely, 2^{1780138302732} is an apocalyptic number.

1780138302732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1780138302732 is an abundant number, since it is smaller than the sum of its proper divisors (2719655740376).

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

1780138302732 is a wasteful number, since it uses less digits than its factorization.

1780138302732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49448286197 (or 49448286192 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 1780138302732 in words is "one trillion, seven hundred eighty billion, one hundred thirty-eight million, three hundred two thousand, seven hundred thirty-two".