61356355547 has 2 divisors, whose sum is σ = 61356355548. Its totient is φ = 61356355546.

The previous prime is 61356355519. The next prime is 61356355573. The reversal of 61356355547 is 74555365316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61356355547 - 2¹² = 61356351451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61356355495 and 61356355504.

It is not a weakly prime, because it can be changed into another prime (61356355507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30678177773 + 30678177774.

It is an arithmetic number, because the mean of its divisors is an integer number (30678177774).

Almost surely, 2^61356355547 is an apocalyptic number.

61356355547 is a deficient number, since it is larger than the sum of its proper divisors (1).

61356355547 is an equidigital number, since it uses as much as digits as its factorization.

61356355547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5670000, while the sum is 50.

The spelling of 61356355547 in words is "sixty-one billion, three hundred fifty-six million, three hundred fifty-five thousand, five hundred forty-seven".