61543504462579 has 2 divisors, whose sum is σ = 61543504462580. Its totient is φ = 61543504462578.

The previous prime is 61543504462547. The next prime is 61543504462663. The reversal of 61543504462579 is 97526440534516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61543504462579 - 2⁵ = 61543504462547 is a prime.

It is a super-2 number, since 2×61543504462579² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61543504492579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30771752231289 + 30771752231290.

It is an arithmetic number, because the mean of its divisors is an integer number (30771752231290).

Almost surely, 2^{61543504462579} is an apocalyptic number.

61543504462579 is a deficient number, since it is larger than the sum of its proper divisors (1).

61543504462579 is an equidigital number, since it uses as much as digits as its factorization.

61543504462579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864000, while the sum is 61.

The spelling of 61543504462579 in words is "sixty-one trillion, five hundred forty-three billion, five hundred four million, four hundred sixty-two thousand, five hundred seventy-nine".