78650786461 has 6 divisors (see below), whose sum is σ = 85166236410. Its totient is φ = 72600725808.

The previous prime is 78650786441. The next prime is 78650786479. The reversal of 78650786461 is 16468705687.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 973752025 + 77677034436 = 31205^2 + 278706^2 .

It is not a de Polignac number, because 78650786461 - 2¹⁵ = 78650753693 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78650786396 and 78650786405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78650786441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 232694466 + ... + 232694803.

It is an arithmetic number, because the mean of its divisors is an integer number (14194372735).

Almost surely, 2^78650786461 is an apocalyptic number.

It is an amenable number.

78650786461 is a deficient number, since it is larger than the sum of its proper divisors (6515449949).

78650786461 is a wasteful number, since it uses less digits than its factorization.

78650786461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465389295 (or 465389282 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 58.

The spelling of 78650786461 in words is "seventy-eight billion, six hundred fifty million, seven hundred eighty-six thousand, four hundred sixty-one".