78739948801 has 4 divisors (see below), whose sum is σ = 78778758100. Its totient is φ = 78701139504.

The previous prime is 78739948799. The next prime is 78739948877. The reversal of 78739948801 is 10884993787.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78203563201 + 536385600 = 279649^2 + 23160^2 .

It is a cyclic number.

It is not a de Polignac number, because 78739948801 - 2¹ = 78739948799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78739948501) 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, 19401606 + ... + 19405663.

It is an arithmetic number, because the mean of its divisors is an integer number (19694689525).

Almost surely, 2^78739948801 is an apocalyptic number.

It is an amenable number.

78739948801 is a deficient number, since it is larger than the sum of its proper divisors (38809299).

78739948801 is a wasteful number, since it uses less digits than its factorization.

78739948801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38809298.

The product of its (nonzero) digits is 24385536, while the sum is 64.

The spelling of 78739948801 in words is "seventy-eight billion, seven hundred thirty-nine million, nine hundred forty-eight thousand, eight hundred one".