782388060991 has 4 divisors (see below), whose sum is σ = 816404933232. Its totient is φ = 748371188752.

The previous prime is 782388060959. The next prime is 782388060997. The reversal of 782388060991 is 199060883287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199060883287 = 7 ⋅28437269041.

It is a cyclic number.

It is not a de Polignac number, because 782388060991 - 2⁵ = 782388060959 is a prime.

It is a super-2 number, since 2×782388060991² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (782388060997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17008436086 + ... + 17008436131.

It is an arithmetic number, because the mean of its divisors is an integer number (204101233308).

Almost surely, 2^782388060991 is an apocalyptic number.

782388060991 is a deficient number, since it is larger than the sum of its proper divisors (34016872241).

782388060991 is a wasteful number, since it uses less digits than its factorization.

782388060991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34016872240.

The product of its (nonzero) digits is 10450944, while the sum is 61.

The spelling of 782388060991 in words is "seven hundred eighty-two billion, three hundred eighty-eight million, sixty thousand, nine hundred ninety-one".