1780432816149 has 36 divisors (see below), whose sum is σ = 2796431901120. Its totient is φ = 1091066427360.

The previous prime is 1780432816121. The next prime is 1780432816153. The reversal of 1780432816149 is 9416182340871.

1780432816149 is a `hidden beast` number, since 1 + 7 + 8 + 0 + 432 + 8 + 161 + 49 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1780432816149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1780432816095 and 1780432816104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1780432816049) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2085367 + ... + 2812404.

It is an arithmetic number, because the mean of its divisors is an integer number (77678663920).

Almost surely, 2^{1780432816149} is an apocalyptic number.

It is an amenable number.

1780432816149 is a deficient number, since it is larger than the sum of its proper divisors (1015999084971).

1780432816149 is a wasteful number, since it uses less digits than its factorization.

1780432816149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4898042 (or 4898026 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 1780432816149 in words is "one trillion, seven hundred eighty billion, four hundred thirty-two million, eight hundred sixteen thousand, one hundred forty-nine".