61100505547 has 2 divisors, whose sum is σ = 61100505548. Its totient is φ = 61100505546.

The previous prime is 61100505533. The next prime is 61100505619. The reversal of 61100505547 is 74550500116.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61100505547 - 2⁷ = 61100505419 is a prime.

It is not a weakly prime, because it can be changed into another prime (61100505847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30550252773 + 30550252774.

It is an arithmetic number, because the mean of its divisors is an integer number (30550252774).

Almost surely, 2^61100505547 is an apocalyptic number.

61100505547 is a deficient number, since it is larger than the sum of its proper divisors (1).

61100505547 is an equidigital number, since it uses as much as digits as its factorization.

61100505547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21000, while the sum is 34.

The spelling of 61100505547 in words is "sixty-one billion, one hundred million, five hundred five thousand, five hundred forty-seven".