68780491541 has 4 divisors (see below), whose sum is σ = 68865511500. Its totient is φ = 68695471584.

The previous prime is 68780491499. The next prime is 68780491561. The reversal of 68780491541 is 14519408786.

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 48335781316 + 20444710225 = 219854^2 + 142985^2 .

It is a cyclic number.

It is not a de Polignac number, because 68780491541 - 2⁶ = 68780491477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68780491561) 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, 42508766 + ... + 42510383.

It is an arithmetic number, because the mean of its divisors is an integer number (17216377875).

Almost surely, 2^68780491541 is an apocalyptic number.

It is an amenable number.

68780491541 is a deficient number, since it is larger than the sum of its proper divisors (85019959).

68780491541 is an equidigital number, since it uses as much as digits as its factorization.

68780491541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85019958.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 68780491541 in words is "sixty-eight billion, seven hundred eighty million, four hundred ninety-one thousand, five hundred forty-one".