78412590005 has 8 divisors (see below), whose sum is σ = 94111197624. Its totient is φ = 62719345600.

The previous prime is 78412590001. The next prime is 78412590017. The reversal of 78412590005 is 50009521487.

It can be written as a sum of positive squares in 4 ways, for example, as 6652359844 + 71760230161 = 81562^2 + 267881^2 .

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

It is not a de Polignac number, because 78412590005 - 2² = 78412590001 is a prime.

It is a super-2 number, since 2×78412590005² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78412590001) 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, 1308566 + ... + 1367175.

It is an arithmetic number, because the mean of its divisors is an integer number (11763899703).

Almost surely, 2^78412590005 is an apocalyptic number.

It is an amenable number.

78412590005 is a deficient number, since it is larger than the sum of its proper divisors (15698607619).

78412590005 is a wasteful number, since it uses less digits than its factorization.

78412590005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2681607.

The product of its (nonzero) digits is 100800, while the sum is 41.

The spelling of 78412590005 in words is "seventy-eight billion, four hundred twelve million, five hundred ninety thousand, five".