78410021105 has 16 divisors (see below), whose sum is σ = 101337844944. Its totient is φ = 57898229760.

The previous prime is 78410021071. The next prime is 78410021149. The reversal of 78410021105 is 50112001487.

It can be written as a sum of positive squares in 8 ways, for example, as 2643605056 + 75766416049 = 51416^2 + 275257^2 .

It is not a de Polignac number, because 78410021105 - 2³² = 74115053809 is a prime.

It is a super-2 number, since 2×78410021105² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 942977 + ... + 1022753.

It is an arithmetic number, because the mean of its divisors is an integer number (6333615309).

Almost surely, 2^78410021105 is an apocalyptic number.

It is an amenable number.

78410021105 is a deficient number, since it is larger than the sum of its proper divisors (22927823839).

78410021105 is a wasteful number, since it uses less digits than its factorization.

78410021105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94916.

The product of its (nonzero) digits is 2240, while the sum is 29.

The spelling of 78410021105 in words is "seventy-eight billion, four hundred ten million, twenty-one thousand, one hundred five".