78231361513361 has 8 divisors (see below), whose sum is σ = 89430841981824. Its totient is φ = 67037773965120.

The previous prime is 78231361513321. The next prime is 78231361513427. The reversal of 78231361513361 is 16331516313287.

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

It is a de Polignac number, because none of the positive numbers 2^k-78231361513361 is a prime.

It is a super-2 number, since 2×78231361513361² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78231361513321) 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, 1473201605 + ... + 1473254706.

It is an arithmetic number, because the mean of its divisors is an integer number (11178855247728).

Almost surely, 2^{78231361513361} is an apocalyptic number.

It is an amenable number.

78231361513361 is a deficient number, since it is larger than the sum of its proper divisors (11199480468463).

78231361513361 is a wasteful number, since it uses less digits than its factorization.

78231361513361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2946460111.

The product of its digits is 1632960, while the sum is 50.

The spelling of 78231361513361 in words is "seventy-eight trillion, two hundred thirty-one billion, three hundred sixty-one million, five hundred thirteen thousand, three hundred sixty-one".