780282961921 has 4 divisors (see below), whose sum is σ = 780470579200. Its totient is φ = 780095344644.

The previous prime is 780282961907. The next prime is 780282961973. The reversal of 780282961921 is 129169282087.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 780282961921 - 2⁷ = 780282961793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (780282961321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93802401 + ... + 93810718.

It is an arithmetic number, because the mean of its divisors is an integer number (195117644800).

Almost surely, 2^780282961921 is an apocalyptic number.

It is an amenable number.

780282961921 is a deficient number, since it is larger than the sum of its proper divisors (187617279).

780282961921 is a wasteful number, since it uses less digits than its factorization.

780282961921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187617278.

The product of its (nonzero) digits is 1741824, while the sum is 55.

The spelling of 780282961921 in words is "seven hundred eighty billion, two hundred eighty-two million, nine hundred sixty-one thousand, nine hundred twenty-one".