78410408765 has 8 divisors (see below), whose sum is σ = 101330374488. Its totient is φ = 57903071040.

The previous prime is 78410408749. The next prime is 78410408767. The reversal of 78410408765 is 56780401487.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7391356729 + 71019052036 = 85973^2 + 266494^2 .

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

It is not a de Polignac number, because 78410408765 - 2⁴ = 78410408749 is a prime.

It is a super-2 number, since 2×78410408765² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78410408767) 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, 603156926 + ... + 603157055.

It is an arithmetic number, because the mean of its divisors is an integer number (12666296811).

Almost surely, 2^78410408765 is an apocalyptic number.

It is an amenable number.

78410408765 is a deficient number, since it is larger than the sum of its proper divisors (22919965723).

78410408765 is a wasteful number, since it uses less digits than its factorization.

78410408765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206313999.

The product of its (nonzero) digits is 1505280, while the sum is 50.

The spelling of 78410408765 in words is "seventy-eight billion, four hundred ten million, four hundred eight thousand, seven hundred sixty-five".