61158573732647 has 2 divisors, whose sum is σ = 61158573732648. Its totient is φ = 61158573732646.

The previous prime is 61158573732587. The next prime is 61158573732731. The reversal of 61158573732647 is 74623737585116.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61158573732647 - 2³⁸ = 60883695825703 is a prime.

It is a super-2 number, since 2×61158573732647² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61158573792647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30579286866323 + 30579286866324.

It is an arithmetic number, because the mean of its divisors is an integer number (30579286866324).

Almost surely, 2^{61158573732647} is an apocalyptic number.

61158573732647 is a deficient number, since it is larger than the sum of its proper divisors (1).

61158573732647 is an equidigital number, since it uses as much as digits as its factorization.

61158573732647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 177811200, while the sum is 65.

The spelling of 61158573732647 in words is "sixty-one trillion, one hundred fifty-eight billion, five hundred seventy-three million, seven hundred thirty-two thousand, six hundred forty-seven".