78707741401 has 3 divisors (see below), whose sum is σ = 78708021951. Its totient is φ = 78707460852.

The previous prime is 78707741389. The next prime is 78707741417. The reversal of 78707741401 is 10414770787.

The square root of 78707741401 is 280549.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10414770787 = 97 ⋅107368771.

It can be written as a sum of positive squares in only one way, i.e., 57432601801 + 21275139600 = 239651^2 + 145860^2 .

It is not a de Polignac number, because 78707741401 - 2⁹ = 78707740889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78707741501) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 140275 + ... + 420823.

It is an arithmetic number, because the mean of its divisors is an integer number (26236007317).

Almost surely, 2^78707741401 is an apocalyptic number.

78707741401 is the 280549-th square number.

78707741401 is the 140275-th centered octagonal number.

It is an amenable number.

78707741401 is a deficient number, since it is larger than the sum of its proper divisors (280550).

78707741401 is an frugal number, since it uses more digits than its factorization.

78707741401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561098 (or 280549 counting only the distinct ones).

The product of its (nonzero) digits is 307328, while the sum is 46.

The spelling of 78707741401 in words is "seventy-eight billion, seven hundred seven million, seven hundred forty-one thousand, four hundred one".