78278360278601 has 16 divisors (see below), whose sum is σ = 95031939252096. Its totient is φ = 62943232432896.

The previous prime is 78278360278571. The next prime is 78278360278607. The reversal of 78278360278601 is 10687206387287.

It is not a de Polignac number, because 78278360278601 - 2⁶ = 78278360278537 is a prime.

It is a super-2 number, since 2×78278360278601² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78278360278607) 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, 1071301166 + ... + 1071374231.

It is an arithmetic number, because the mean of its divisors is an integer number (5939496203256).

Almost surely, 2^{78278360278601} is an apocalyptic number.

It is an amenable number.

78278360278601 is a deficient number, since it is larger than the sum of its proper divisors (16753578973495).

78278360278601 is a wasteful number, since it uses less digits than its factorization.

78278360278601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142675728.

The product of its (nonzero) digits is 75866112, while the sum is 65.

The spelling of 78278360278601 in words is "seventy-eight trillion, two hundred seventy-eight billion, three hundred sixty million, two hundred seventy-eight thousand, six hundred one".