41278537697 has 4 divisors (see below), whose sum is σ = 41431989780. Its totient is φ = 41125085616.

The previous prime is 41278537591. The next prime is 41278537717. The reversal of 41278537697 is 79673587214.

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 4431431761 + 36847105936 = 66569^2 + 191956^2 .

It is a cyclic number.

It is not a de Polignac number, because 41278537697 - 2³⁴ = 24098668513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41278537997) 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, 76725638 + ... + 76726175.

It is an arithmetic number, because the mean of its divisors is an integer number (10357997445).

Almost surely, 2^41278537697 is an apocalyptic number.

It is an amenable number.

41278537697 is a deficient number, since it is larger than the sum of its proper divisors (153452083).

41278537697 is a wasteful number, since it uses less digits than its factorization.

41278537697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153452082.

The product of its digits is 17781120, while the sum is 59.

The spelling of 41278537697 in words is "forty-one billion, two hundred seventy-eight million, five hundred thirty-seven thousand, six hundred ninety-seven".