784479974487 has 16 divisors (see below), whose sum is σ = 1180408740480. Its totient is φ = 459047842400.

The previous prime is 784479974479. The next prime is 784479974497.

784479974487 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 784479974487 - 2³ = 784479974479 is a prime.

It is a super-2 number, since 2×784479974487² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (784479974407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 409863189 + ... + 409865102.

It is an arithmetic number, because the mean of its divisors is an integer number (73775546280).

Almost surely, 2^784479974487 is an apocalyptic number.

784479974487 is a deficient number, since it is larger than the sum of its proper divisors (395928765993).

784479974487 is a wasteful number, since it uses less digits than its factorization.

784479974487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819728334.

The product of its digits is 3186376704, while the sum is 78.

The spelling of 784479974487 in words is "seven hundred eighty-four billion, four hundred seventy-nine million, nine hundred seventy-four thousand, four hundred eighty-seven".