78802206461 has 4 divisors (see below), whose sum is σ = 85966043424. Its totient is φ = 71638369500.

The previous prime is 78802206451. The next prime is 78802206463. The reversal of 78802206461 is 16460220887.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78802206461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78802206463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3581918465 + ... + 3581918486.

It is an arithmetic number, because the mean of its divisors is an integer number (21491510856).

Almost surely, 2^78802206461 is an apocalyptic number.

It is an amenable number.

78802206461 is a deficient number, since it is larger than the sum of its proper divisors (7163836963).

78802206461 is a wasteful number, since it uses less digits than its factorization.

78802206461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7163836962.

The product of its (nonzero) digits is 258048, while the sum is 44.

The spelling of 78802206461 in words is "seventy-eight billion, eight hundred two million, two hundred six thousand, four hundred sixty-one".