61454432539 has 2 divisors, whose sum is σ = 61454432540. Its totient is φ = 61454432538.

The previous prime is 61454432521. The next prime is 61454432587. The reversal of 61454432539 is 93523445416.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61454432539 - 2¹⁵ = 61454399771 is a prime.

It is not a weakly prime, because it can be changed into another prime (61454432239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30727216269 + 30727216270.

It is an arithmetic number, because the mean of its divisors is an integer number (30727216270).

Almost surely, 2^61454432539 is an apocalyptic number.

61454432539 is a deficient number, since it is larger than the sum of its proper divisors (1).

61454432539 is an equidigital number, since it uses as much as digits as its factorization.

61454432539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1555200, while the sum is 46.

The spelling of 61454432539 in words is "sixty-one billion, four hundred fifty-four million, four hundred thirty-two thousand, five hundred thirty-nine".