78402862213 has 4 divisors (see below), whose sum is σ = 84433851628. Its totient is φ = 72371872800.

The previous prime is 78402862201. The next prime is 78402862247. The reversal of 78402862213 is 31226820487.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25862429124 + 52540433089 = 160818^2 + 229217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78402862213 is a prime.

It is a super-2 number, since 2×78402862213² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78402862213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78402862283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3015494688 + ... + 3015494713.

It is an arithmetic number, because the mean of its divisors is an integer number (21108462907).

Almost surely, 2^78402862213 is an apocalyptic number.

It is an amenable number.

78402862213 is a deficient number, since it is larger than the sum of its proper divisors (6030989415).

78402862213 is a wasteful number, since it uses less digits than its factorization.

78402862213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6030989414.

The product of its (nonzero) digits is 258048, while the sum is 43.

The spelling of 78402862213 in words is "seventy-eight billion, four hundred two million, eight hundred sixty-two thousand, two hundred thirteen".