781480617361 has 8 divisors (see below), whose sum is σ = 782175670848. Its totient is φ = 780785850000.

The previous prime is 781480617353. The next prime is 781480617367. The reversal of 781480617361 is 163716084187.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 781480617361 - 2³ = 781480617353 is a prime.

It is a super-2 number, since 2×781480617361² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 781480617299 and 781480617308.

It is not an unprimeable number, because it can be changed into a prime (781480617367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5590956 + ... + 5729026.

It is an arithmetic number, because the mean of its divisors is an integer number (97771958856).

Almost surely, 2^781480617361 is an apocalyptic number.

It is an amenable number.

781480617361 is a deficient number, since it is larger than the sum of its proper divisors (695053487).

781480617361 is a wasteful number, since it uses less digits than its factorization.

781480617361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143063.

The product of its (nonzero) digits is 1354752, while the sum is 52.

The spelling of 781480617361 in words is "seven hundred eighty-one billion, four hundred eighty million, six hundred seventeen thousand, three hundred sixty-one".