78657221741 has 16 divisors (see below), whose sum is σ = 91041220608. Its totient is φ = 66563996400.

The previous prime is 78657221701. The next prime is 78657221771. The reversal of 78657221741 is 14712275687.

It is a cyclic number.

It is not a de Polignac number, because 78657221741 - 2¹⁰ = 78657220717 is a prime.

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 78657221741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78657221701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73856 + ... + 403446.

It is an arithmetic number, because the mean of its divisors is an integer number (5690076288).

Almost surely, 2^78657221741 is an apocalyptic number.

It is an amenable number.

78657221741 is a deficient number, since it is larger than the sum of its proper divisors (12383998867).

78657221741 is a wasteful number, since it uses less digits than its factorization.

78657221741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330032.

The product of its digits is 1317120, while the sum is 50.

The spelling of 78657221741 in words is "seventy-eight billion, six hundred fifty-seven million, two hundred twenty-one thousand, seven hundred forty-one".