78289461389461 has 12 divisors (see below), whose sum is σ = 91072681662720. Its totient is φ = 67104318750840.

The previous prime is 78289461389449. The next prime is 78289461389537. The reversal of 78289461389461 is 16498316498287.

It is not a de Polignac number, because 78289461389461 - 2³¹ = 78287313905813 is a prime.

It is a super-2 number, since 2×78289461389461² (a number of 29 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 (78289461389431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7548981 + ... + 14613898.

It is an arithmetic number, because the mean of its divisors is an integer number (7589390138560).

Almost surely, 2^{78289461389461} is an apocalyptic number.

It is an amenable number.

78289461389461 is a deficient number, since it is larger than the sum of its proper divisors (12783220273259).

78289461389461 is a wasteful number, since it uses less digits than its factorization.

78289461389461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22234984 (or 22234977 counting only the distinct ones).

The product of its digits is 1003290624, while the sum is 76.

The spelling of 78289461389461 in words is "seventy-eight trillion, two hundred eighty-nine billion, four hundred sixty-one million, three hundred eighty-nine thousand, four hundred sixty-one".