61367578541 has 2 divisors, whose sum is σ = 61367578542. Its totient is φ = 61367578540.

The previous prime is 61367578471. The next prime is 61367578543. The reversal of 61367578541 is 14587576316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57468075625 + 3899502916 = 239725^2 + 62446^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61367578541 is a prime.

Together with 61367578543, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61367578543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30683789270 + 30683789271.

It is an arithmetic number, because the mean of its divisors is an integer number (30683789271).

Almost surely, 2^61367578541 is an apocalyptic number.

It is an amenable number.

61367578541 is a deficient number, since it is larger than the sum of its proper divisors (1).

61367578541 is an equidigital number, since it uses as much as digits as its factorization.

61367578541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4233600, while the sum is 53.

The spelling of 61367578541 in words is "sixty-one billion, three hundred sixty-seven million, five hundred seventy-eight thousand, five hundred forty-one".