78556240801 has 4 divisors (see below), whose sum is σ = 78558147504. Its totient is φ = 78554334100.

The previous prime is 78556240759. The next prime is 78556240823. The reversal of 78556240801 is 10804265587.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10804265587 = 1229 ⋅8791103.

It is a cyclic number.

It is not a de Polignac number, because 78556240801 - 2¹¹ = 78556238753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78556210801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 890155 + ... + 974416.

It is an arithmetic number, because the mean of its divisors is an integer number (19639536876).

Almost surely, 2^78556240801 is an apocalyptic number.

It is an amenable number.

78556240801 is a deficient number, since it is larger than the sum of its proper divisors (1906703).

78556240801 is a wasteful number, since it uses less digits than its factorization.

78556240801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906702.

The product of its (nonzero) digits is 537600, while the sum is 46.

The spelling of 78556240801 in words is "seventy-eight billion, five hundred fifty-six million, two hundred forty thousand, eight hundred one".